Questions posted in Mathematics - AssignmentGrade.com

Questions posted in Mathematics

Solve the porproton 2/z-5=z/0.5z^2+7

\bf \cfrac{2}{z-5}=\cfrac{z}{0.5z^2+7}\implies \cfrac{2}{z-5}=\cfrac{z}{\frac{1}{2}z^2+7}\impliedby cross-multiplying
\\\\\\
2\left( \frac{1}{2}z^2+7 \right)=(z-5)z\implies z^2+14=z^2-5z
\\\\\\
\underline{z^2-z^2}+14=-5z\implies 14=-5z\implies \cfrac{14}{-5}=z

ANSWERED AT 29/05/2020 - 05:23 PM


QUESTION POSTED AT 29/05/2020 - 05:23 PM

Points A(-2,3), B(-5,-4), and C(2,-1) form triangle ABC on a coordinate plane. What is the area of this triangle in square units?

1. Draw an accurate picture of the triangle in the coordinate axes, as shown in the attached picture.

2. Circumscribe a rectangle about the triangle, as shown in the picture. The coordinates of the points M, N, T are easily identifiable as shown in the picture.

3. The area of the triangle ABC is  The area of the rectangle - Area 1- Area 2- Area 3.

Area 1 = 1/2(3*7)=21/2
Area 2 = 1/2(4*4)=1/2*16=8
Area 3 = 1/2( 3*7)=21/2

Area 1+Area 2+Area 3=21/2+21/2+8=21+8=29 (units squared)

Area rectangle=  7*7=49 (units squared)


Answer: Area of triangle is 20 units squared.

ANSWERED AT 29/05/2020 - 05:21 PM


QUESTION POSTED AT 29/05/2020 - 05:21 PM

HELP ASAP PLEASE!!!!!

The rule for inscribed angles and their corresponding arcs is that the measure of the angle is one-half that of the arc. Therefore, all we have to do is divide 68/2, which gets us an answer of D. 34.

Hope this helps!

ANSWERED AT 29/05/2020 - 05:21 PM


QUESTION POSTED AT 29/05/2020 - 05:21 PM

Helpvplease..............

The domain of a function corresponds to the x-values. Therefore, we can disregard the y-values altogether. Finally, all we have to do is put together the values in the x-column. This gets us an answer of B. {3, 4, 5, 6}.

Hope this helps!

ANSWERED AT 29/05/2020 - 05:21 PM


QUESTION POSTED AT 29/05/2020 - 05:21 PM

48 question ?can you

I cant see the question but can u pull it up

ANSWERED AT 29/05/2020 - 05:21 PM


QUESTION POSTED AT 29/05/2020 - 05:21 PM

If Harold White, with 50/100/50 coverage, is at fault in an accident in which Bill Bland and his wife and daughter are injured, how much will the insurance company pay if costs of medical care are as shown?Bill Bland $8,000Mrs. Bland $65,000Bland's daughter $20,000

For information on the meaning of 50/100/50 see
https://www.linkedin.com/pulse/have-you-seen-50100100-your-auto-insurance-policy-do-know-vancura

50=bodily injury max 50000 per individual
so the payment would be 8000+50000+20000=78000 before deductibles and coinsurance, if any is applicable.

ANSWERED AT 29/05/2020 - 05:21 PM


QUESTION POSTED AT 29/05/2020 - 05:21 PM

Jerry has been a returning contestant on a game show for the last seven weeks. In a contestant's first seven appearances on the show they have a chance to answer one question and win anywhere between $200-$900. On their eighth appearance they get a chance to answer a question worth $10,000. Given Jerry's winnings in the following table, describe what would happen to the mean and median of the data set if he were to get the Week 8 question right. Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 $684 $770 $481 $647 $277 $853 $712 a. The mean increases by $1,803, the median increases by $698. b. The mean decreases by $1,803, the median decreases by $698. c. The mean decreases by $1,171, the median decreases by $14. d. The mean increases by $1,171, the median increases by $14.

The mean for the first seven weeks is given:
 \frac{684+770+481+647+277+853+712}{7} =632

The median for the first seven weeks is given by the middle value of the data after being set in ascending order

277   481   647   684  712   770   853

The middle value is the 4th value, so Median = 684
----------------------------------------------------------------------------------------------------------------

Assuming Jerry wins the price for the 8th week, the new mean is given
 \frac{684+770+481+647+277+853+712+10000}{8} =1803

The new Median is now located between the 4th and 5th value, which is the mid value between 684 and 712.
A quick way to work this out is (684+712)÷2 = 698
---------------------------------------------------------------------------------------------------------------

The increase in mean is 1803-632 = 1171
The increase in Median is 698 - 684 = 14

Correct answer is d

ANSWERED AT 29/05/2020 - 05:21 PM


QUESTION POSTED AT 29/05/2020 - 05:21 PM

HELP PLEASE ASAP!!!!

The rule for inscribed angles to arcs is that the measure of the arc is double the measure of the angle. Therefore, we do 36 x 2, which gets us an answer of B. 72.

Hope this helps!

ANSWERED AT 29/05/2020 - 05:20 PM


QUESTION POSTED AT 29/05/2020 - 05:20 PM

Given the letter h l q r and s how many different possible 5 letter words can you make?

None......................................

ANSWERED AT 29/05/2020 - 05:20 PM


QUESTION POSTED AT 29/05/2020 - 05:20 PM

I don't understand, help please ? :)

Basically it is asking, for example:
If you move the decimal from 654 three places to the right, would the 10^ have a 10^- or a 10^+

ANSWERED AT 29/05/2020 - 05:20 PM


QUESTION POSTED AT 29/05/2020 - 05:20 PM

How do actresses use math?

Is this a joke? If so, not sure.

ANSWERED AT 29/05/2020 - 05:20 PM


QUESTION POSTED AT 29/05/2020 - 05:20 PM

To change Fahrenheit temperatures to Celsius temperatures, you can use the formula C = 5959(F – 32). Which answer is the best first step to solve the equation for F?

-We cannot add 32 to both sides yet since it is attached to F within the parenthesis. 
-It is not subtract F from both sides since the F is already separated on the opposite side from C. 
-We cannot divide F because it is still within the parenthesis. 
I assume by 5959 you mean 5/9 and by 9595 you mean 9/5. So by multiplying 
each side by 9/5, you are able to isolate the parenthesis (F-32). 
9/5C= F-32
If you wanted to solve the equation all the way through, you would just add 32 to each side. 

ANSWERED AT 29/05/2020 - 05:19 PM


QUESTION POSTED AT 29/05/2020 - 05:19 PM

Look at the graph shown below:What equation best represents the line?A. y = 3/4x + 4 B. y = 4/3x + 4 C. y = 4x + 3/4 D. y = 4x + 4/3

So.. take a peek at the picture... let's get two points from it, hmm say 0,4 notice it touches the y-axis there, and say hmmm -4, 1, almost at the bottom of the line

\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ 0}}\quad ,&{{ 4}})\quad 
%   (c,d)
&({{ -4}}\quad ,&{{ 1}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{1-4}{-4-0}

\bf y-{{ y_1}}={{ m}}(x-{{ x_1}})\qquad 
\begin{array}{llll}
\textit{plug in the values for }
\begin{cases}
y_1=4\\
x_1=0\\
m=\boxed{?}
\end{cases}\\
\textit{and solve for "y"}
\end{array}\\
\left. \qquad   \right. \uparrow\\
\textit{point-slope form}

once you get the slope and solve for "y", that'd be the equation of the line.

ANSWERED AT 29/05/2020 - 05:19 PM


QUESTION POSTED AT 29/05/2020 - 05:19 PM

Marcus spent 10 hours doing his homework last week.This week he spent 11 hours doing homework homework.He says he spent 110% more time doing his homework this week . Is he correct

Yes because 100 percent is 10 hrs so 1 more hr is 110 percent. And if u try to put it in a equation it will be 110%

ANSWERED AT 29/05/2020 - 05:19 PM


QUESTION POSTED AT 29/05/2020 - 05:19 PM

Write and solve and equation to find the value of the variables 5.2,8.3,8.5,7.7,7.8,y; mean=7.1

Same thing, add all numbers but y, but divided by 6 now since there are 6 numbers on the left.

ANSWERED AT 29/05/2020 - 05:18 PM


QUESTION POSTED AT 29/05/2020 - 05:18 PM

Plot the point (-5,1) on the grid

Plot -5 on the x axis and 1 on the y axis . 

ANSWERED AT 29/05/2020 - 05:18 PM


QUESTION POSTED AT 29/05/2020 - 05:18 PM

How to determine if 4 or more points are coplanar, and if they are not, why is that?

If 4 points r coplanar we have many technic to find but the shortcut is to lock at the points 
Example : Let 4 points A(1,1) , B(-1,1) ,C(-1,-1), D(1,-1) 
Here, A is in 1st co-ordinate , B is in 2nd co-ordinate , C is in 3rd co-ordinate and D is in 4th so if the 4 points had same - or + number for x and y as in P(x,y) then they r coplanar 

ANSWERED AT 29/05/2020 - 05:18 PM


QUESTION POSTED AT 29/05/2020 - 05:18 PM

A circle has a radius of 8 cm. What is its area? Use = 3.14.

The formula for the area of the circle is:
 Area=  \pi r^{2}
All you have to do is plug in 8 for r :)

ANSWERED AT 29/05/2020 - 05:18 PM


QUESTION POSTED AT 29/05/2020 - 05:18 PM

The graph below shows the solution to a system of inequalitie Which of the following inequalities is modeled by the graph

Given the graph, we need to look for the equation of the line using the linear equation since the plot is obviously a line.

To do that, we need two points. The simplest points to locate are the two points that converges the x and y axes which are (3,0) and (4,0), respectively. Now we apply the linear equation formulation:

y = mx+b

First, we need to get the slope.

m = (y2-y1)/(x2-x1)
m = (4-0)/(0-3)
m = -4/3

Since we know the slope, we need to look for the b which is also the y-intercept or the point at which x = 0.

So at x = 0, which point or value at y-axis hits with the line? It is the point (0,4).
Therefore, b = 4.

Completing the equation,

y = -(4/3)x + 4

or we can write it as

4x + 3y = 12.

Now to know which of the choices is correct, we simply assign values and see for ourselves which is true.

Let x = 2, so y = 2

4(2) + 3y = 12
8 < 12

If you assign more values, you will notice that 4x + 3y is always less than or equal to 12. Thus, the answer is letter a.

ANSWERED AT 29/05/2020 - 05:18 PM


QUESTION POSTED AT 29/05/2020 - 05:18 PM

The expression 1.08s + 1.02b predicts the end-of-year value of a financial portfolio where s is the value of stocks and b is the value of bonds in the portfolio at the beginning of the year. What is the predicted end-of-year value of a portfolio that begins the year with $200, in stocks and $100 in bonds?

We have 
Stock = $200
Bonds = $100

Substitute these values into 1.08s+1.02b, where 's' is stock and 'b' is bond
1.08(200)+1.02(100)=318

Predicted end of year value is $318

ANSWERED AT 29/05/2020 - 05:17 PM


QUESTION POSTED AT 29/05/2020 - 05:17 PM

The graph below shows a system of equations: The x-coordinate of the solution to the system of equations is _____?

The solution is where the lines cross. So your x coordinate is 3.

ANSWERED AT 29/05/2020 - 05:17 PM


QUESTION POSTED AT 29/05/2020 - 05:17 PM

Simplify this radical expressionSolve √z/64

\bf \sqrt{\cfrac{z}{64}}\implies \cfrac{\sqrt{z}}{\sqrt{64}}\implies \cfrac{\sqrt{z}}{8}

ANSWERED AT 29/05/2020 - 05:16 PM


QUESTION POSTED AT 29/05/2020 - 05:16 PM

Will congruent chords always make isosceles triangles

YES THEY WILL YOUR WELCOME.

ANSWERED AT 29/05/2020 - 05:16 PM


QUESTION POSTED AT 29/05/2020 - 05:16 PM

Find the area of a circle whose circumference measures 28 centimeters.

Assume the radius is R.

2*pi*R = 28 -> R = 14/pi

So the area will be pi*R^2 = 196/pi

ANSWERED AT 29/05/2020 - 05:16 PM


QUESTION POSTED AT 29/05/2020 - 05:16 PM

Which of the following is the same as 8.4 × 102 ? A. 84 B. 8,400 C. .84 D. 840

Based on the given answers, do you possibly mean 100 instead of 102?
If so, you would move the decimal point of 8.4 two places to the right, meaning the answer would be letter D. 840.

ANSWERED AT 29/05/2020 - 05:16 PM


QUESTION POSTED AT 29/05/2020 - 05:16 PM

How do you multiply a fraction by a whole number

Assuming the +'s are actually x's  1/2 of 3 is 1.5 and 1.5 divided by 7 is 1.5/7.(answer is 1.5/7) hopefully I'm right.

ANSWERED AT 29/05/2020 - 05:15 PM


QUESTION POSTED AT 29/05/2020 - 05:15 PM