MATHEMATICS HIGH SCHOOL

Ashley works for 2.8 hours. For each hour that she works, she makes $7.75. How much money does she make in all

Answers

Answer 1

Answer:

Answer:

$21.7

Step-by-step explanation:

2.8 hours * 7.75 dollars = 21.7 dollars

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At a local pizza parlor, the large pies have a diameter of 16 inches. each large pie can be cut into either 8 slices or 12 slices based on customers preference. how much larger is the area of a slice of pizza from the 8 piece pie then the area of a slice of pizza from the 12 piece pie round your answer to the nearest tenth of a square inch (please explain how you got the answer)

Answers

Area=Pi r^2

A=3.1414592 x 8^2

A=201.06 Inches^2

201.06/8 =25.13 inch^2-the size of each of the 8 slices

201.06/12=16.76 inch^2-the size of each of the 12 slices

25.13/16.76=1.50 - 1 =.50 x 100 =50% bigger-the 8/12 slices.

You could just as well divide the diameter of the pie by 8 and 12 and the difference would be the same, or 50% larger.

Which value of K will make x^2-1/4x+k a perfect square trinomial?

Answers

For this case we have the following polynomial:
$x^2 - (1)/(4)x + k$
We suppose that we have a standard equation of the form:
$ax ^ 2 + bx + c$
To make a perfect square trinomial, we need to complete the square.
Therefore, the value of c is:
$c = ((b)/(2))^2$
Using this definition for this case, we have:
$k = (((-1)/(4))/(2))^2$
$k= ( (-1)/(8) )^2$
$k = (1)/(64)$
Therefore, the perfect square trinomial is:
$x^2 - (1)/(4)x + (1)/(64)$
Answer:
The value of k is:
$k = (1)/(64)$

1/64, because (-1/4)/2 is -1/8, and -1/8 ^2 is 1/64

An insurance for an appliance costs $47 and will pay $582 if the insured item breaks plus the cost of the insurance. The insurance company estimates that the proportion 0.06 of the insured items will break.Let X be the random variable that assigns to each outcome (item breaks, item does not break) the profit for the company. A negative value is a loss. The distribution of X is given by the following table.

X 47 -582
p(x) ? 0.06
Complete the table and calculate the expected profit for the company. In other words, find the expected value of X.

Answers

Answer: See explanation!

Step-by-step explanation:

To complete the table, we need to calculate the probability of the item not breaking. Since the proportion of items that break is 0.06, the proportion of items that do not break is 1 - 0.06 = 0.94.

Now we can fill in the table:

X | -582 | 47

p(x) | 0.06 | 0.94

To calculate the expected profit for the company, we multiply each outcome by its corresponding probability and sum the results:

Expected profit = (-582) * 0.06 + 47 * 0.94

Calculating this expression, we find that the expected profit for the company is approximately $3.92.

Therefore, the expected value of X, the random variable representing the profit for the company, is $3.92.

Step-by-step explanation:

Three sisters shared $3.60 equal. how much did each sisters get?

Answers

360 divided by 3 is 120 so it is $1.20

If you want you could also just do 3.60 divided by 3 which is 1.2 so $1.20, whichever you prefer

The formula P = ns gives the formula for the perimeter of a regular polygon with n sides and side length s.What is the length of each side of a regular octagon with a perimeter of 54.4 cm? A regular octagon has 8 equal sides.

Answers

P= 54.4
n=8
s=?
Divide P(54.4) by n(8) and you get s(6.8).

The graph of y=x^2 and y=cosx intercept in how many points?

Answers

They intercept in two points.

The graph y=x^2 is very basic so I suppose you know how it looks like.
It's like a U and starts from the origin (0,0)

The graph y=cosx is similar to y=x^2 but in a different way.
y=cosx doesn't pass from (0,0) it passes from (0,1) and then to (-1,0) and (1,0).
Basically, it goes like this..
~

If you know how the two graphs look like then you can understand why they intercept only two times.

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