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3 years ago

What is the circumference of a circle with a diameter of 9 feet? Use 3.14 for

Mathematics

2 answers:

rosijanka [135]3 years ago

7 0

Answer:

C = 28.26 ft

Step-by-step explanation:

The circumference of a circle is given by

C = pi *d

C = 3.14 *9

C = 28.26 ft

natita [175]3 years ago

7 0

the formula for calculating the circumference is $\pi$ x diameter

so, 3.14 x 9 = 28.26ft (a)

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Find 5g(x)-f(x) given f(x)=9x^2+7x and g(x)=2-x

givi [52]

Answer:

- 9x² - 12x + 10

Step-by-step explanation:

5g(x) - f(x)

= 5(2 - x) - (9x² + 7x) ← distribute both parenthesis

= 10 - 5x - 9x² - 7x ← collect like terms

= - 9x² - 12x + 10

4 0

3 years ago

The table shows the change in yards forthree plays in football games use information to complete the statement below

PIT_PIT [208]

Play C gained the most yards

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gregori [183]

Answer:

C. b=1053

Step-by-step explanation:

Isolate b:

0.25b+168.75=432
Subtract 168, 0.25b=263.25
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6 0

3 years ago

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Nezavi [6.7K]

Answer:

5a^2 + 7a

Step-by-step explanation:

Combine like terms

6 0

3 years ago

What is the simplified form of the following expression?

ziro4ka [17]

For this case we must simplify the following expression: $7 (\sqrt [3] {2x}) - 3 (\sqrt [3] {16x}) - 3 (\sqrt [3] {8x})$

We rewrite:

$16x = 2 ^ 3 * 2x\\8x = 2 ^ 3 * x$

We rewrite the expression:

$7 (\sqrt [3] {2x}) - 3 (\sqrt [3] {2 ^ 3 * 2x}) - 3 (\sqrt [3] {2 ^ 3 * x}) =$

By definition of properties of powers and roots we have:

$\sqrt [n] {a ^ m} = a ^ {\frac {m} {n}}$

Then, taking the terms of the radical:

$7 (\sqrt [3] {2x}) - 3 (2 \sqrt [3] {2x}) - 3 (2 \sqrt [3] {x}) =\\7 \sqrt [3] {2x} -6 \sqrt [3] {2x} -6 \sqrt [3] {x} =$

We add similar terms:

$\sqrt [3] {2x} -6 \sqrt [3] {x}$

Answer:

Option C

7 0

3 years ago