I've got a couple more questions in my pretest i don't understand any of it

QUESTION POSTED AT 03/12/2019 - 12:35 PM

Answered by admin AT 03/12/2019 - 12:35 PM


-- PQS is a right triangle, because a tangent to a circle is
perpendicular to the radius at the point of tangency.

-- You know PQ (a leg) and PS (the hypotenuse) so you can
find the length of the other leg.

               QS = (PQ)² - (PS)² =  (4.2)² - (8.2)² = 7.043.

-- If you draw the radius  PR, then you have another right triangle
back to back with the first one.  Each hypotenuse is a radius, so
those are equal, and PQ is common to both triangles.
So  RQ  is equal to  QS.

-- The length of the whole chord  RS  is double the length of  QS .

           RS  =  2 x (QS)  =  2 x (7.043)  =  14.085 .

That looks a lot like the third choice down.

Post your answer

Related questions

Can someone help me with my last question

What you need to do is that you plug p=3 into the expression [(5.4p+5)+(8+3.2p)]/2 and you have:
[(5.4*3+5)+(8+3.2*3)]/2
= (21.2+ 17.6)/2
= 38.8/2
= 19.4

The average of the two boys' points is p=3 is 19.4 points~

ANSWERED AT 14/12/2019 - 06:13 PM


QUESTION POSTED AT 14/12/2019 - 06:13 PM

Can someone help me with my question

Answer=8.6c+13

Meg earns $5.40 per car and $5 in tips. Given the information, Meg's earnings can be shown in the expression '5.40c+5'

Rich earned 3.20 per car and $8 in tips. Given the information, Rich's earnings can be shown with the expression '3.20c+8'

Now lets put the expressions together to see how much they made all together...

5.40c+5+3.20c+8
add 5.40c and 3.20c
8.60c+5+8
add 5 and 8
8.60c+13
or
8.6c+13




ANSWERED AT 14/12/2019 - 06:12 PM


QUESTION POSTED AT 14/12/2019 - 06:12 PM

I will thank and badge if you can answer this question for me!!!A vector u has initial point (−2, 1) and terminal point (3, 5). Write u in the form u=ai+bj.

You simply subtract from the coordinates of the terminal point to the coordinates of the initial point.
The x-coordinate is represented the unit vector i and the y-coordinate is for unit vector j. So,
vector u = (-2 - 3)i + (1 - 5)j = -5i - 4j

ANSWERED AT 14/12/2019 - 06:10 PM


QUESTION POSTED AT 14/12/2019 - 06:10 PM

Please help me with these questions!!! I really need help :)

Rectangular prism
V = 12*8*4 = 384 in^3

Triangular prism
V = 0.5*3*15*16 = 360 ft^3

ANSWERED AT 14/12/2019 - 06:05 PM


QUESTION POSTED AT 14/12/2019 - 06:05 PM

Identify the arc length of TV in terms of π. (image is attached) The answers for this question were: ≈0.67pi in., ≈1.83pi in., ≈3.67pi in., or ≈1.33pi in.

Use the formula of arc length that is
s = rθ
where s = arc length, r = radius, θ = angle (unit must be in radian)
Given r = 5 in and θ = 48°( π /180°) = (4/15)* π = 0.2667 π,
s = 5 in (0.2667π) = 1.333 π in

ANSWERED AT 14/12/2019 - 05:50 PM


QUESTION POSTED AT 14/12/2019 - 05:50 PM

6d 1 = 15-d I really don't understand thisssss and my teacher won't help

You required to find the value of d.
Always remember the concept that if you transpose "+" sign to the other side, it becomes "-" sign, and vice versa. Make sure that you arrange the like terms and constants. Solving the equation,
6d + 1 = 15 - d
6d + d = 15 - 1
7d = 14
d = 14/7 = 2

When transposing a multiplication, you divide it to the other side.

Verifying the solution,
6(2) + 1 = 15 - 2
12 + 1 = 13
13 = 13

ANSWERED AT 14/12/2019 - 05:50 PM


QUESTION POSTED AT 14/12/2019 - 05:50 PM

A merry-go-round has a radius of 10 ft. To the nearest tenth of a foot, what distance does the merry-go-round cover when it rotates through an angle of 72°? For my first try, I got 62.9 as my answer, and it was marked wrong. I did this a second time, and got 12.6. I would like to check with anyone else to see if I got the answer right. The answers for this question were: 62.9, 12.6, 25.1, or 125.7

Yes, the correct answer is 12.6 ft.

Using the formula of arc length, that is
s = rθ
where s = arc length, r = radius, θ = angle (unit must be in radian)
With r = 10 ft and θ = 72 deg ( π/180 deg) = 1.26 rad,
s = (10)(1.26) = 12.6 ft

ANSWERED AT 14/12/2019 - 05:50 PM


QUESTION POSTED AT 14/12/2019 - 05:50 PM

Jeremy opens a chocolate shop in the city. He pays $1,500 a month for rent and maintenance of the shop. The price of raw materials and manufacturing the chocolates is $6,000 a month. He sells the chocolates individually and in boxes of a dozen. Jeremy understands that his business needs a little time to become a success and decides that he wants to build a customer base initially. He is happy to break even for the first year. If Jeremy sells 2,400 individual chocolates and 50 boxes a month, how should he price his chocolates to break even, given the costs? (Assume that the price of a box is the same as the price of 12 individual chocolates.)

Amount of money paid by Jeremy as rent and maintenance of shop per month = $1500
Cost of raw materials and manufacturing per month = $6000
Total cost that Jeremy has to spend per month = (1500 + 6000) dollars
                                                                            = 7500 dollars
Number of individual chocolates sold = 2400
Number of chocolates sold in boxes = 50 boxes
                                                           = (12 * 50) chocolates
                                                           = 600 chocolates
Then
Total number of chocolates sold by Jeremy = 2400 + 600
                                                                       = 3000
Now
Price of each chocolate = 7500/3000 dollars
                                       = 75/30 dollars
                                       = 5/2 dollars
                                       = 2.5 dollars
Price of 600 chocolates = 600 * (5/2) dollars
                                       = 300 * 5 dollars
                                       = 1500 dollars
Price of 12 chocolates = (1500/600) * 12
                                     = 15 * 2
                                     = 30 dollars
Then
We can say that each box of chocolate should be sold at $30. All the loose chocolates should be sold at $2.5 each.

ANSWERED AT 14/12/2019 - 05:42 PM


QUESTION POSTED AT 14/12/2019 - 05:42 PM

How do write the integer to the question, which is greater, 2 or -13?

Because 2 is positive and -13 is negative, and positive numbers are always greater than negative numbers, 2 is greater than -13~

ANSWERED AT 14/12/2019 - 05:36 PM


QUESTION POSTED AT 14/12/2019 - 05:36 PM

A ball falls 350 centimeters. Is it positive or negative? (Sorry I've been asking these a lot just want to make sure I'm getting this right) 8D

Well i would think it is negative since the ball is falling and the height is decreasing.
But i am not quite sure what your asking though .
I hope this helped you

ANSWERED AT 14/12/2019 - 05:28 PM


QUESTION POSTED AT 14/12/2019 - 05:28 PM

How do you write 10x 10 x 10 x10 using exponents SHOW YOUR WORK WILE ANSWERING THIS QUESTION

The way you write 10x10x10x10 using exponents. The way you use exponents is by counting the numbers of 10 there are since there is four you have to put 10 with a little number four on the top next to the number. Just in case that way you say it is 10 to the fourth power

ANSWERED AT 14/12/2019 - 05:21 PM


QUESTION POSTED AT 14/12/2019 - 05:21 PM

Please help with these math questions

There are several ways to solve this. I would use substitution. to do that you want to get the X in the bottom equation by itself. after that substitute that new equation for the x in 2x. so it would look like 2(new equation). solve that then you will find y. do the exact same thing to y to find x. if you're still confused, ask me.

ANSWERED AT 14/12/2019 - 05:04 PM


QUESTION POSTED AT 14/12/2019 - 05:04 PM

What are extremes in math with an example so I can understand it better?

Y=x2 the extreme would be x=0

ANSWERED AT 14/12/2019 - 04:43 PM


QUESTION POSTED AT 14/12/2019 - 04:43 PM

This question is related to the scatter graph can someone please help me on this question

I think the first two are false and the second two are true

ANSWERED AT 14/12/2019 - 02:40 PM


QUESTION POSTED AT 14/12/2019 - 02:40 PM

Please help me!!! I don't understand how to solve it(((

 \sqrt{( \sqrt{7-2 \sqrt{10} }+ \sqrt{2} )*2 \sqrt{5}  }=  \\ = \sqrt{( \sqrt{2-2 \sqrt{2*5}+5 }+ \sqrt{2} )*2 \sqrt{5}  }= \\  \sqrt{( \sqrt{( \sqrt{2}- \sqrt{5})^{2}    }+ \sqrt{2} )*2 \sqrt{5}  }= \\  \sqrt{(  \sqrt{5}-  \sqrt{2} + \sqrt{2} )*2 \sqrt{5}  }= \\ \sqrt{  \sqrt{5} *2 \sqrt{5}  }=   \\  \sqrt{2*5} = \sqrt{10}
HAVE A NICE DAY!! ^^

ANSWERED AT 14/12/2019 - 02:38 PM


QUESTION POSTED AT 14/12/2019 - 02:38 PM

A store is having a sale to celebrate President's Day. Every item in the store is advertised as one-fifth off the original price. If an item is marked with a sale price of $140 what was its original price? Im having trouble with this question. Can someone please show the answer and explain??

Lets look at what we know so far:
♥ Sale Price: 20% 
♥ Original Price: $175.00
♥ Off Price: $140.00
Gather the information and solve: 
20% off of $175
= $140
=$175 
Final answer: $175 

ANSWERED AT 14/12/2019 - 01:50 PM


QUESTION POSTED AT 14/12/2019 - 01:50 PM

Prove algebraically the the following equation is an identity: (2 cos x + 3 sin x) ^2 + ( 3 cos x - 2 sin x)^2 =13 Sorry I just updated the question b/c I was trying re edit this question with a plus sign in one of the equation so people don't get confused. But I couldn't find the edit button so just copied and pasted it again but updated.

(2cos(x) + 3sin(x))² + (3cos(x) - 2sin(x))² = 13
(2cos(x) + 3sin(x))(2cos(x) + 3sin(x)) + (3cos(x) - 2sin(x))(3cos(x) - 2sin(x)) = 13
(2cos(x)(2cos(x) + 3sin(x)) + 3sin(x)(2cos(x) + 3sin(x))) + (3sin(x)(3cos(x) - 2sin(x)) - 2sin(x)(3cos(x) - 2sin(x))) = 13
(2cos(x)(2cos(x)) + 2cos(x)(3sin(x)) + 3sin(x)(2cos(x)) + 3sin(x)(3sin(x))) + (3cos(x)(3cos(x)) - 3cos(x)(2sin(x)) - 2sin(x)(3cos(x)) + 2sin(x)(2sin(x))) = 13
(4cos²(x) + 3sin(2x) + 3sin(2x) + 9sin²(x)) + (9cos²(x) - 3sin(2x) - 3sin(2x) + 4sin²(x)) = 13
  (4cos²(x) + 6sin(2x) + 9sin²(x)) + (9cos²(x) - 6sin(2x) + 4sin²(x)) = 13
(4cos²(x) + 9cos²(x)) + (6sin(2x) - 6sin(2x)) + (9sin²(x) + 4sin²(x)) = 13
                                                                     13cos²(x) + 13sin²(x) = 13
                                       13(¹/₂(1 + cos(2x))) + 13(¹/₂(1 - cos(2x))) = 13
               13(¹/₂(1)) + 13(¹/₂(cos(2x))) + 13(¹/₂(1)) - 13(¹/₂(cos(2x))) = 13
                             13(¹/₂) + 13(¹/₂cos(2x)) + 13(¹/₂) - 13(¹/₂cos(2x)) = 13
                                               6¹/₂ + 6¹/₂cos(2x) + 6¹/₂ - 6¹/₂cos(2x) = 13
                                                6¹/₂ + 6¹/₂ + 6¹/₂cos(2x) - 6¹/₂cos(2x) = 13
                                                                                              13 + 0 = 13
                                                                                                    13 = 13
The following equation is an identity.

ANSWERED AT 14/12/2019 - 01:43 PM


QUESTION POSTED AT 14/12/2019 - 01:43 PM

When 560,000 is written in scientific notation what is the power of 10 what was the question

To find the scientific notation, we need to move the decimal until we get a number between 1 and 10.

560,000 --->  5.6

5.6 

Now, we need to count how many times we moved the decimal.

We moved it 5 places to the left.

5.6 * 10^5

Final answer:      5.6 * 10^5

ANSWERED AT 14/12/2019 - 01:24 PM


QUESTION POSTED AT 14/12/2019 - 01:24 PM

A right triangle has legs measuring 4.5 meters and 1.5 meters the lengths of the legs of a second triangle are proportional to the lengths of the legs of the first triangle which could be the lengths of the legs of the second tiangle please answer i really need help in this question thanks


One approach that might be a great help would be if you would look
at the choices ... those things at the bottom of the question that you
didn't give us.

-- One leg is 3 times the length of the other leg.

-- Any right triangle that has one leg three times as long as the other
leg is similar to this triangle. 

I'll bet that if you look through the choices, you'll find one there.

ANSWERED AT 14/12/2019 - 01:03 PM


QUESTION POSTED AT 14/12/2019 - 01:03 PM

The total, T, salary of an employee who has a base salary of $27,000 and earns an extra $500 per month. Write an equation to solve the question. NEED HELP ASAP

Answer=$33,000

Assuming you are looking for the annual salary...

A base salary is the fixed amount of money paid the the employer, not counting bonuses or benefits.

Along with earning a base salary, this personals earned an extra $500 per month. There are 12 months in a year.

The following equation can be written:

T=$27,000+12*$500
T=$27,000+6,000
T=$33,000

ANSWERED AT 14/12/2019 - 12:57 PM


QUESTION POSTED AT 14/12/2019 - 12:57 PM

Okay.This is a question just for points.And the question is what is {(94 x 3)+ (86 /2)- (3)}?

{(94*3)+ (86 /2)- (3)}= 282+86/2 −3= =282+43 −3 =325−3 =322 Answer is 322

ANSWERED AT 14/12/2019 - 12:51 PM


QUESTION POSTED AT 14/12/2019 - 12:51 PM

Made a mistake on a question. Correction: jack and Diana were multiplying 13X7. Jack said that if he added 7 thirteen times and he would get the right answer. Diana said that if she added 13 seven times she would get the right answer. Explain who will end up with the right answer and how do you know

Both Jack and Diana will end up getting the right answer because adding seven thirteen times is the same as adding thirteen seven times. 7x13 is 91 and 13x7 is 91 too. They just switched the numbers but they kept the operations the same which is called commutative property. You are doing multiplying so it is called commutative property of multiplication. 

Hope that helped:)

ANSWERED AT 14/12/2019 - 12:33 PM


QUESTION POSTED AT 14/12/2019 - 12:33 PM

Stella is doing her math worksheets. It takes her 1 hour 20 minutes to complete one worksheet with 12 questions. How many hours will it take Stella to complete 36 questions.

 that would be four hours.

12x3=36

1 hour 20 minutes x3= 4 hours 

ANSWERED AT 14/12/2019 - 12:11 PM


QUESTION POSTED AT 14/12/2019 - 12:11 PM

QUESTION: 7,8 and 11 please, please, please, please 10 point I don't have more PLEASE HELP 7.-Find the least common multiple of each set of 4, 10, 12 a)12 b)120 c)2 d)60 8.-Factor 54a + 24b a) 6(54a = 24b) b) 6ab(9 + 4) c) 6(9a + 4b) d) 78ab 9.-9. Caleb’s receipt for lunch is shown below. If Caleb pays with a $10 bill, how much change will he receive? a) $6.92 b) $5.74 c) $3.18 d) $3.08

Hey :)
Number 7:
-->Let's find the least common multiple of 4, 10, and 12 by listing again:
4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40... 60
10: 10, 20, 30, 40, 50, 60
12: 12, 24, 36, 48, 60
-->As you can see, the LCM is d or 60
* Just a random thought but did you accidently write 7 for the other one?

Number 8:
-->By factoring the expression, you would be finding a factor that both numbers share (usually the GCF) and divide the whole expression by that number:
"What is the GCF of 54 and 24?"
"6!"
--> So now that you know the GCF or just factor, you can divide the expression by it:
54a+24b
54a(/6)+24b(/6)
9a+4b
--> Sorry if this gets confusing but now you put the end result in parentheses with what you divided it by on the outside
6(9a+4b)
-->Or in other words, answer choice 'c'!

Number 9:
-->Sorry but I can't answer it yet because you didn't say what his recipt is. I can help you once you tell me what's on the receipt :)

ANSWERED AT 14/12/2019 - 11:52 AM


QUESTION POSTED AT 14/12/2019 - 11:52 AM

Four students are playing a math game at home. One of the math game questions asked them to write an algebraic equation. Brandon wrote: 3(5x - 0) William wrote: 7 < 2(6 + x) Alice wrote: 15x Kayla wrote: 11 = 2x + 3 Which student wrote an algebraic equation? (1) Brandon (3) Alice (2) William (4) Kayla


Kayla wrote an equation.
William wrote an inequality.
They both have solutions.
Kayla's solution is  x=4 .
William's solution is   x > -2.5 .

Brandon and Alice wrote expressions. 
Those are just numbers, that depend on the value of 'x'.

ANSWERED AT 14/12/2019 - 10:55 AM


QUESTION POSTED AT 14/12/2019 - 10:55 AM

THESE ARE SEPARATE QUESTIONS THAT I DECIDED TO COMBINE: 1. It takes Sarah 50 minutes to walk to her friend's house 1 3/4 miles away. What is her walking pace in miles per hour? 2. The temperature in St. Paul was 45 degrees Fahrenheit. Five minutes later it was 30 degrees Fahrenheit. What was the average change in temperature per minute as an integer? 3. Caroline bought 5 bracelets. Find the total cost of the bracelets if each bracelet cost $3.10. Justify your answer by using the Distributive Property. 4. Explain why the expression 13x + 10 cannot be factored. 5. Jamar earned $2,500 from his summer job at the grocery store. This is $350 more than twice what his friend Todd earned. How much did Todd earn from his summer job? Whoever is answering this please answer the questions fully. This questions are just worded long and I don't know how to answer them. So please answer all the questions above. Thank you!


1).  Her walking pace is  (1.75 miles) / (50 minutes).

If you want it in units of (miles per hour), do it like this:

               (1.75 miles / 50 minutes) x (60 minutes / 1 hour)

           =  (  1.75 x 60 / 50 ) miles per hour.

2).  The average change was 

                         (30 - 45) degrees  / (5 minutes) .

I'm sure you can do the division and make an integer out of that.

3).  Each bracelet cost $3.10.
Caroline bought five of them, so she spent $3.10 five times.
Either do the multiplication, or else write down $3.10 five times
and do the addition.

4).  In order to factor the expression, the two terms would need
to have some common factor ... both terms need either a power
of 'x', or they need two numbers that have a common factor.
They don't both have an 'x', and 13 and 10 have no common factor.

5).  Todd earned 'T' dollars.
Twice what Todd earned is  2T .
$350 more than that is   2T+350 .
The question says that 2,500 is exactly that amount,
so you can write
                                                  2T + 350 =  2,500

Subtract 350 from each side:    2T           =  2,150

Divide each side by  2:              (you can finish it now)

ANSWERED AT 14/12/2019 - 10:39 AM


QUESTION POSTED AT 14/12/2019 - 10:39 AM

Jasmine plans to take a short vacation in two weeks. Before her vacation, she wants to earn more than $700 each week. The store where she works pays her $500 per week plus 5% of her sales for that week. How much in sales, s, does she need to make each week to meet her goal? Write and solve an inequality to answer this question.

Y = Earnings per week

X = Sales per week

5% = 1/20

---------------

Y = 500 + 1/20 * X

----------------

500 + 1/20 * X > 700

1/20 * X  > 700 - 500

1/20 * X > 200

20 * 1/20 * X > 200 * 20

X > 4000

--------------

Jasmine needs to make over $4,000 in sales each week to meet her target.

ANSWERED AT 14/12/2019 - 10:11 AM


QUESTION POSTED AT 14/12/2019 - 10:11 AM