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lakkis [162]
2 years ago
10

Keshawn is taking a multiple choice test with a total of 40 points available. Each question is worth exactly 2 points. What woul

d be Keshawn's test score (out of 40) if he got 6 questions wrong? What would be his score if he got xx questions wrong?
Mathematics
1 answer:
nata0808 [166]2 years ago
7 0

Answer:

28

Step-by-step explanation:

each question is worth 2 points and he missed 6,6 times 2 is 12.therefore you subtract 40 by 12 and get 28 :)

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How many elements are in the set {whole numbers between 3 and 15}?
densk [106]
It is 11 elements :)
6 0
2 years ago
Does this matrix have an inverse?why or why not ?
Ierofanga [76]

Answer:

C. No, because it's determinant is zero

Step-by-step explanation:

A= \begin{bmatrix} 16 & - 4\\\\ 8 & - 2\end{bmatrix}

det(A) =\begin{vmatrix} 16 & - 4\\\\ 8 & - 2\end{vmatrix}

det(A) = 16\times (-2)-(-4)\times 8

det(A) = -32+32

det(A) = 0

8 0
3 years ago
The roof of a grain silo is in the shape of a cone. The inside radius is 20 feet, and the roof is 10 feet tall. Below the cone i
nirvana33 [79]

Answer:

41887.90 cubic feet

Step-by-step explanation:

We need to find the volume of the silo.

We simply need to find the volume of the cylindrical part and the conical part and add them together.

The body of the silo is a cylinder with height of 30 ft and radius of 20 ft and the roof is a cone with height 10 ft and radius 20 ft.

The volume of a cylinder is given as:

V = \pi r^2h

The volume of a cone is given as:

V = \frac{1}{3} \pi r^2H

where r = radius of cylinder and cone

h = height of cylinder

H = height of cone

Adding them together, we have that the volume of the silo is:

V = \pi r^2h + \frac{1}{3} \pi r^2H

V = \pi r^2 (h + \frac{1}{3}H)\\ \\V = \pi * 20^2 (30 + [\frac{1}{3}* 10]) \\\\V = 1256.64 ( 30 + 3.33)\\\\V = 1256.64(33.33)\\\\V = 41887.90 ft^3

The volume of the silo is 41887.90 cubic feet.

5 0
2 years ago
Do not use decimals in your answer​
Finger [1]

60+15x=8

15x=8-60

15x=-52

x=-15/52

8 0
2 years ago
Read 2 more answers
Simplify: (p-q)^2 + 2pq
lorasvet [3.4K]

Answer:

(p-q)^2+2pq

= p^2-2pq+q^2+2pq

= p^2+q^2

Step-by-step explanation:

Please mark me the brainliest :-)

7 0
2 years ago
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