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Mathematics

1 answer:

Natali5045456 [20]3 years ago

7 0

Answer:

1 and 39/40

Step-by-step explanation:

Is east just add

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How many terms are in the expression 6y-7+4y-2a

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Answer: 3

Step-by-step explanation:

6y, 4y, and 2a

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Answer is (c) BC.

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Let f(x)=x2+6x+11.<br><br> What is the average rate of change from x = 5 to x = 8?

Naddik [55]

19.

To find this you first have to find the f(x) values for x = 5 and x = 8

x = 5
f(x) = 5^2 + 6(5) + 11
f(x) = 25 + 30 + 11
f(x) = 66

x = 8
f(x) = 8^2 + 6(8) + 11
f(x) = 64 + 48 + 11
f(x) = 123

Then you subtract the two from each other to see how much it has changed in those 3 numbers.

123 - 66 = 57.

Then you take that answer and divide it by the change in x (which is 3)

57/3 = 19

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3 years ago

Building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18 \pi18π18, pi m

Ksivusya [100]

the area A of the cross section of the column is $(81\pi )m^2$ .

<u>Step-by-step explanation:</u>

Here we have , building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π, pi meters. We need to find What is the area A of the cross section of the column .Let's find out:

We know that , Circumference of circle = $2\pi r$