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3 years ago

Which expressions, when evaluated with y = –7, are positive in value?

Mathematics

1 answer:

Kruka [31]3 years ago

6 0

A) 18+(2*(-7)) = 4
B) (-3(-7))+(-17) = 4
C) (-2(-7))-23 = -9
D) -30-(4(-7)) = -2
So your answer is A and B

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Use the compound interest formula to compute the total amount accumulated and the interest earned.

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3 years ago

The scale model of a skyscraper being built is 4.2 feet tall.

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2 years ago

What inequality describes the solutions of 2y less than or equal to 8?

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Answer:

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$2y\leq 8\\$

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2 years ago

Match each circular flower bed on the left to its circumference and its area on the right. Some answer options on the right will

marin [14]

Answer:

Bed A --- Third Option

Bed B --- Fifth Option

Step-by-step explanation:

Flower Bed A)

The formula for circumference is:

$C=2\pi r$

The diameter of A is 10 feet. So, its radius is 5 feet.

Substitute 5 for r. So, the circumference of Bed A is:

$C=2\pi (5)=10\pi\text{ feet}$

The formula for the area of a circle is:

$A=\pi r^2$

Substitute 5 for r:

$A=\pi (5)^2$

Square and simplify:

$A=25\pi \text{ square feet}$

So, the circumference of Bed A is 10π feet and its area is 25π square feet.

Therefore, match Bed A to the third option.

Flower Bed B)

The radius of Bed B is 6 feet. Again, we can use the circumference and area formulas. Substitute 6 for r for circumference:

$C=2\pi (6)$

Multiply:

$C=12\pi\text{ feet}$

Substitute 6 for r for the area formula:

$A=\pi(6)^2$

Square and simplify:

$A=36\pi\text{ square feet}$

So, Bed B has a 12π feet circumference and a 36π square feet area.

Therefore, match Bed B to the fifth option.

And we're done!

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3 years ago