Questions posted in Mathematics - AssignmentGrade.com

Questions posted in Mathematics

If Katie bought some flowers she use 3/8 of it to bake bread what percent of the flour is left

Eight minus three is five so 5/8.

ANSWERED AT 01/04/2020 - 01:48 PM


QUESTION POSTED AT 01/04/2020 - 01:48 PM

At another theater workers have to cut a new trap door.the door can be no mre than 130 sq ft in the area with whole number side lengths.they have to bring in 3 items to the stage.the first item is 6 feet,5 inches wide and 8 feet,9 inches long.the seconed item is 13 feet,4 inches wide and 7 feet, 8 inches long.the third item is 5 feet,6 inches wide and12 feet, 4 inches long. what size of trap door would you reccomend? what is the perimeter of the trap door

HhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhGiven:
trap door = 130 square feet.

1st item: 6ft 5in wide & 8ft 9in long 
⇒ (6ft * 12 in) + 5 in & (8ft *12 in) + 9 in
⇒ 77inches by 105 inches
⇒ 8,085 square inches

2nd item: 13ft 4in wide & 7ft 8in long
⇒ (13ft * 12in)+ 4 in & (7ft *12in) + 8 in
⇒ 160 inches by 92 inches
⇒ 14,720 square inches

3rd item: 5ft 6in wide & 12ft 4in long
⇒ (5 ft * 12in) + 6 in & (12ft * 12in) + 4in
⇒ 66 inches by 148 inches
⇒ 9,768 square inches

130 square feet convert to square inches.
130 sq. ft * 144 sq.in/sq.ft = 18,720 sq. in

18,720 sq. in / 160 inches = 117 inches

Length = 160 inches ; Width = 117 inches
Perimeter = 2(160 + 117)
P = 2(277)
P = 554 inches
P = 2(277)
P = 554 inches 

ANSWERED AT 01/04/2020 - 01:48 PM


QUESTION POSTED AT 01/04/2020 - 01:48 PM

In one town, 39% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats. Round to the nearest thousandth if necessary.

Answer:

The probability is 0.152

Step-by-step explanation:

We know that in this town 39% of all voters are Democrats. Therefore, the probability of a randomly selected voter being a Democrat is p=0.39

The experiment of randomly select voters for a survey is called a Bernoulli experiment (under some suppositions). We suppose that exist independence in this randomly selection of voters. We also suppose that there are only two possibilities for the voter : It is Democrat or not.

Now the variable X : ''The randomly selected voter for a survey is Democrat'' is a Binomial random variable.

X ~ Bi (n,p)

The probability function for the BInomial random variable X is :

P(X=x)=(nCx).p^{x}.(1-p)^{n-x}

Where ''n'' is the number of Bernoulli experiments (In this case n = 2 because we randomly selected two voters)

P(X=x) is the probability of the variable X to assumes the value x

(nCx) is the combinatorial number define as

(nCx)=\frac{n!}{x!(n-x)!}

p = 0.39 in this exercise.

We are looking for P(X=2) ⇒

P(X=2)=(2C2).(0.39)^{2}.(1-0.39)^{2-2}=(0.39)^{2}=0.1521

If we round to the nearest thousandth the probability is 0.152

ANSWERED AT 01/04/2020 - 01:48 PM


QUESTION POSTED AT 01/04/2020 - 01:48 PM

PLZ help! Combine like terms (simply) 7 -3(4-2x) -10x students Answer: 16 - 18x What was the students mistake? What us the right way to do this?

Correct answer: 7-12+6x which simplifies to -5+6x

ANSWERED AT 01/04/2020 - 01:48 PM


QUESTION POSTED AT 01/04/2020 - 01:48 PM

45÷3=15 is the same as___ ÷3 plus_____÷3=______

36 divided by 3 plus 90 divided by 3 I think I hope this helps u

ANSWERED AT 01/04/2020 - 01:47 PM


QUESTION POSTED AT 01/04/2020 - 01:47 PM

What is the square root of 4 5

Square root of 45 is 6.7082039325

ANSWERED AT 01/04/2020 - 01:47 PM


QUESTION POSTED AT 01/04/2020 - 01:47 PM

Find the volume of the cylinder. Round your answer to the nearest tenth

V = pi*(r^2)*h
V = pi*(7^2)*5
V = pi*(49)*5
V = 245pi ft^2
V = 796.7 ft^2

ANSWERED AT 01/04/2020 - 01:47 PM


QUESTION POSTED AT 01/04/2020 - 01:47 PM

An electric pump can fill a 45-gallon tub in half an hour.At this rate, how long would it take to fill a 60-gallon tub?

You can cross multiply to find the answer. Start by setting up your equation:

45/30 = 60/x  (30 represents half an hour)
Next, cross multiply, 45 times x, and 60 times 30: 

45x = 1800  you must isolate the "x" value by using the opposite operation it is involved in. Here we have 45x (x is multiplied to 45) so we must divide 45, which will cancel itself out, leaving us with "x."

What you do on one side of the equation, you must do on the other, so divide 1800 by 45 as well, which will leave you with 40.

Working it out on paper, your equation should now look like this: x=40, which represents the amount of time it will take to fill a 60 gallon tube.

Answer: It will take 40 minutes to fill a 60 gallon tube. 

ANSWERED AT 01/04/2020 - 01:47 PM


QUESTION POSTED AT 01/04/2020 - 01:47 PM

If the sale tax in New York is 8.25%, about how much will a 65.95 pair of shoe cost, including sale tax

79.14 dolaaaaaaaaaaaaaaaaaaaaaaaaarrrrrs

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

What is the equation of the circle with a Center of (0,9) and a Radius of 7

Equation of Circle:

Center(h,k) radius(r)

(x-h)^2 + (y-k)^2 = r^2


#14
C(0,0) r = 2

(x-0)^2 + (y-0)^2 = 2^2
x^2 + y^2 = 4


#15
C(2,0) r = 3

(x-2)^2 + (y-0)^2 = 3^2
(x-)^2 + y^2 = 9


...

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Shermans computer store has a computer on sale for 812.00. the sales tax is 7.5percent what is the total cost of the computer

computer on sale for 819.5

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Why Is markup necessary for retail sales

Markup is necessary for the company to gain money instead of losing money

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

The sale tax in New York is 8.25%, about how much will a 65.95 pair of shoes cost including sale tax

Sale tax in NEW YORK wilbe for the shoes
cost including the tax 74.2

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

37 is decreased to 17 rounded to the nearest tenth

I think it is 20 because 17 rounded is 20

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Find the volume of the cylinder. Round your answer to the nearest tenth

Answer. 42.41
Cylinder Equation: SA= 2× 3.14×r^2+2×3.14×r×h
Diameter of circle divided by 2 to get the radius =1.5
R= Radius
H=Height

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Im in dyer need of how to solve these problems

#4)
{ A}
Triangle ABC is congruent to triangle YXZ. How do I know this?
 Look at the angles and adjacent (bottom) line.
Because Angle A and Angle Y are both equal to (what I believe says) 78 degrees, they are equal. 
Next, Angle B is equal to Angle X because it is the angle that connects the adjacent (bottom) line and the hypotenuse (top line). Even though they have no measurements or tick marks, it's the process of elimination.
Finally, Angle C and Angle Z. We know that these are equal do to their degree similarity of (what I think is) 65.

{B} Triangle ABC is congruent to Triangle RSQ. How do I know this?
Because Angle A is congruent to the only other angle there, Angle R.
Next, B and S are congruent. If you think of them as angles, then you can see that "angle" b is connected to the leg of AB and BC. AC has one tick mark, as does RS. BC has no tick or anything to note it's congruence. So because Point be is stick in between a leg with one tick and one leg with no tick, look for the similarity in triangle RSQ. The similarity showing as S. You should understand enough now to know how I got how C and P are congruent. 

#5) Sadly I cannot read the diagram they provide, so I cannot help with it.

#6) The length of BC: ?  The length of XZ:   ?  Measure of Angle BZX: 55 degrees. 

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Pls help me i need help fast

So if we add all the shirts together we get 48. So starting with the 1st one. 8/48 if the chance Jack selects a blue shirt.  If we simplify 8/48 we get 1/6. So the answer is The Probability of Jack selecting a blue shirt

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

What is the sine ratio of angle E? A - 5/3 B - 3/5 C - 5/4 D - 4/5

Answer:

The correct option is B.

Step-by-step explanation:

In a right angled triangle

\sin \theta=\frac{perpendicular}{hypotenuse}=\frac{opposite}{hypotenuse}

In the given triangle DEF, the opposite sides of angle E is DF=6 units and hypotenuse EF=10 units.

The sine ratio of angle E is

\sin E=\frac{DF}{EF}

\sin E=\frac{6}{10}

\sin E=\frac{3}{5}

The sine ratio of angle E is 3/5, therefore the correct option is B.

ANSWERED AT 01/04/2020 - 01:46 PM


QUESTION POSTED AT 01/04/2020 - 01:46 PM

Can someone please help me with this?

Mes Arc ZWX (clockwise) = mes Arc ZW + mes Arc WX

mes Arc ZW =180° &  mes Arc WX=45° (given)

Then mes Arc ZWX (clockwise) = 180°+45° = 225°

ANSWERED AT 01/04/2020 - 01:45 PM


QUESTION POSTED AT 01/04/2020 - 01:45 PM

Please someone come thru for me idk how to get these answers

I can barley see can you take another one please

ANSWERED AT 01/04/2020 - 01:45 PM


QUESTION POSTED AT 01/04/2020 - 01:45 PM

Bruce buys a trampoline prices at $54. if the sales tax is 3 2/5% how much tax will bruce pay

$1.836 round off to $1.84 tax on $54 product with tax of 3.4%

ANSWERED AT 01/04/2020 - 01:45 PM


QUESTION POSTED AT 01/04/2020 - 01:45 PM

Fill all of this out please

The answer of 2 is a

ANSWERED AT 01/04/2020 - 01:45 PM


QUESTION POSTED AT 01/04/2020 - 01:45 PM

What's the diameter of a circle with a radius of 12

24 diameters is the answer

ANSWERED AT 01/04/2020 - 01:45 PM


QUESTION POSTED AT 01/04/2020 - 01:45 PM

What is the area of the figure below?

192 ft.
We can start by finding the area of the whole shape. 18*12= 216
Then we can see that the shape cut out has a length of 6 and the missing 8 from the 10. so 6*8= 48 and we cut 48 in half since the small shape was cut in half and get 24.  So 216-24= 192ft
If you don't get it tell me, it is hard to explain.

ANSWERED AT 01/04/2020 - 01:45 PM


QUESTION POSTED AT 01/04/2020 - 01:45 PM

I need help asap!! I don't really get it bc I don't know if you include the $12 or not.

12+3x=30
Subtract 12 from both sides
3x=18
Divide by 3 both side
X=6
They can buy 6 buckets

ANSWERED AT 01/04/2020 - 01:44 PM


QUESTION POSTED AT 01/04/2020 - 01:44 PM

A ball has a radius of 5 inches. What is the volume it can hold

A ball is a Sphere sooooo......
V=4/3 \pi r^{3}
And when you enter the radius.....
The answer will be about 523.6 inches

ANSWERED AT 01/04/2020 - 01:44 PM


QUESTION POSTED AT 01/04/2020 - 01:44 PM

Monique says that three and one fourth g/cm3 is an Outlier. Is she right or wrong

She is right. Monique is right

ANSWERED AT 01/04/2020 - 01:44 PM


QUESTION POSTED AT 01/04/2020 - 01:44 PM