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Nat2105 [25]
3 years ago
5

Which choice could represent the surface area of a pyramid?

Mathematics
2 answers:
AnnZ [28]3 years ago
8 0
75.6 ft^2
The surface area of a pyramid is always squared. Hope that helps
nasty-shy [4]3 years ago
6 0

Answer:

C

Step-by-step explanation:

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The graph and the equation show the relationship between gas price and amount of gas purchased for two different stations. Which
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We are unable to answer this question without being able to see the graph.

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2 years ago
If cos(x) = Three-fourths and tan(x) < 0, what is cos(2x)?
makvit [3.9K]

Step-by-step explanation:

The value of sin(2x) is \sin(2x) = - \frac{\sqrt{15}}{8}sin(2x)=−

8

15

How to determine the value of sin(2x)

The cosine ratio is given as:

\cos(x) = -\frac 14cos(x)=−

4

1

Calculate sine(x) using the following identity equation

\sin^2(x) + \cos^2(x) = 1sin

2

(x)+cos

2

(x)=1

So we have:

\sin^2(x) + (1/4)^2 = 1sin

2

(x)+(1/4)

2

=1

\sin^2(x) + 1/16= 1sin

2

(x)+1/16=1

Subtract 1/16 from both sides

\sin^2(x) = 15/16sin

2

(x)=15/16

Take the square root of both sides

\sin(x) = \pm \sqrt{15/16

Given that

tan(x) < 0

It means that:

sin(x) < 0

So, we have:

\sin(x) = -\sqrt{15/16

Simplify

\sin(x) = \sqrt{15}/4sin(x)=

15

/4

sin(2x) is then calculated as:

\sin(2x) = 2\sin(x)\cos(x)sin(2x)=2sin(x)cos(x)

So, we have:

\sin(2x) = -2 * \frac{\sqrt{15}}{4} * \frac 14sin(2x)=−2∗

4

15

∗

4

1

This gives

\sin(2x) = - \frac{\sqrt{15}}{8}sin(2x)=−

8

15

6 0
2 years ago
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2 years ago
BRAINLIEST! URGENT! Please help me, If you can explain how you got the answer and if you answer both questions, I will mark you
anastassius [24]

Answer:

1. I have simplified the first question:

x=\frac{10-ab}{a-4};\quad \:a\ne \:4

2. I have found the parabola properties:

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The garden club earned $15 per hour by weeding neighborhood gardens for t hours. A generous donor has agreed to double their ear
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Answer: 35

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