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Tanzania [10]
3 years ago
12

NEED HELP ASAP Wayne bought some toy cars, c, and some baseball cards, b. Each toy car cost $3 and each baseball card cost $2. W

hich expression represents the total cost of Wayne's purchase?
A.
3 + b + 2 + c
B.
3b + 2c
C.
3 × 2 + b × c
D.
3c + 2b
Mathematics
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

Hey mate.....

Step-by-step explanation:

This is ur answer.....

<h2>D. 3c + 2b</h2>

Hope it helps!

Mark me brainliest pls.....

Follow me!!! :)

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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:

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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

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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}

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

Av=\frac{81}{9}

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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.

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Step-by-step explanation:

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