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3 years ago

ILL GIVE U 20 POINTS AND BRAINLIEST, pls hurry!

Mathematics

1 answer:

serious [3.7K]3 years ago

4 0

Answer:

(1/2,5)

Step-by-step explanation:

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Which is f(-1) for the function f(x)= 3x^2+9

blsea [12.9K]

Answer:

C. f(-1) =12

Step-by-step explanation:

f(x)= 3x^2+9

Let x=-1

f(-1) = 3(-1)^2 +9

= 3(1)+9

= 3+9

= 12

f(-1) =12

4 0

3 years ago

Read 2 more answers

Simplify: 10 - 2(3+4)*

melomori [17]

Answer: -4

Step-by-step explanation:

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3 years ago

5•m=35 what’s the value of m

nikitadnepr [17]

Answer:

Step-by-step explanation:

5x5=35

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3 years ago

1. Solve the following equations on the interval {0 ≤ ≤ 2}. Round your answer to two decimal places where exact solutions are no

Andrei [34K]

HEY MATE ! Here is ur answer...

3 0

3 years ago

A farmer is tracking the amount of corn his land is yielding each year. He finds that the function f(x) = −x2 + 20x + 50 models

polet [3.4K]

Answer:

The crop yield increased by 9 pounds per acre from year 1 to year 10.

Step-by-step explanation:

To solve this we are using the average rate of change formula: $Av=\frac{f(x_2)-f(x_1)}{x_2-x_1}$ , where:

$x_2$ is the second point in the function

$x_1$ is the first point in the function

$f(x_2)$ is the function evaluated at the second point

$f(x_1)$ is the function evaluated at the first point

We know that the first point is 1 year and the second point is 10 years, so $x_1=1$ and $x_2=10$ . Replacing values:

$Av=\frac{-(10)^2+20(10)+50-[-(1)^2+20(1)+50]}{10-1}$

$Av=\frac{-100+200+50-[-1+20+50]}{9}$

$Av=\frac{150-[69]}{9}$

$Av=\frac{150-69}{9}$

$Av=\frac{81}{9}$

$Av=9$

Since $f(x)$ represents the number of pounds per acre and $x$ the number of years, we can conclude that the crop yield increased by 9 pounds per acre from year 1 to year 10.

6 0

3 years ago