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1 year ago

Given F(x) = x2 + 4x − 9, evaluate. F(−4)

Mathematics

1 answer:

gtnhenbr [62]1 year ago

3 0

F(x)=x2+4x-9
F(-4)=-4(2)+4(-4)-9
=-8+(-16)-9
=-24-9
=-42

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Help me pleaseee!!!!!!!!!

torisob [31]

Answer:

90°

Step-by-step explanation:

All circles are equal to 360°. Since the pie chart is a circle, if you added all of the central angles for all three sections, it would total to 360°.

Since the circle is not divided into 360 parts for each degree, but 100 parts for each percent %.

You can <u>solve using an equivalent</u>. Write each fraction in the form "Lemonade" over "total". The left side is percentage, the right side is degrees.

Let x be the central angle for lemonade

$\frac{25}{100}=\frac{x}{360}$

Solve for the central angle of lemonade by <u>isolating 'x'</u>. To isolate x, move 360 over to the other side. When moving numbers in an equivalent, you do the opposite operation to both sides. Since 'x' divides by 360, multiply 360 on both sides.

$\frac{25}{100}=\frac{x}{360}$

$360*\frac{25}{100}=360*\frac{x}{360}$ 360 cancels out on the right

$\frac{360*25}{100}=x$ Combined multiplication in numerator

$\frac{9000}{100}=x$ When dividing, 0s cancel out

$\frac{90}{1}=x$ Simplify fraction over 1

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Therefore the central angle in the Lemonade section is 90°.

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4 years ago

I will MARK THE CROWN IF SOMEONE ANSWERS THESES

kirza4 [7]

Answer:

the last picture answer is

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the third picture answer is

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3 years ago

Find the area of circle b in terms of pi

kondor19780726 [428]

To find the area of the circle use the A = πr²

r (or radius) = 1.5

Plug in 1.5 for r

A = π(1.5)²

Square 1.5

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hope this helps

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3 years ago

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olchik [2.2K]

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4 years ago

Read 2 more answers

Compare the dimensions of the prisims. How many time greather is the surface area of the red prism than the surface area of the

Reil [10]

Answer:

the answer for the first one is 3 times

the answer for the second one is 9

Step-by-step explanation:

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2 years ago