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2 years ago

11

Evaluate the expression when a =7 and y=-3. y-9a

2 answers:

11111nata11111 [884]2 years ago

8 0

Answer:

-6

Step-by-step explanation:

Gnom [1K]2 years ago

6 0

The right answer is -6

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The price of a watch was increased by 20% to 198. What was the price before the increase?

RoseWind [281]

To find the original price before the increase, divide the new price by 1 + the percent of increase.

198 / 1.20 = 165

The original price was $165

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3 years ago

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The circumference of a circle can be found using the formula C = 2r. Which is an equivalent equation solved for r? r = C r = C(2

vaieri [72.5K]

Answer:

r equals StartFraction C Over 2 pi EndFraction

Step-by-step explanation:

we know that

The circumference of a circle is equal to

$C=2\pi r$

where

r is the radius of the circle

Solve for r

That means -----> isolate the variable r

Divide by 2π both sides

$\frac{C}{2\pi}=\frac{2\pi r}{2\pi}$

Simplify right side

$\frac{C}{2\pi}=r$

Rewrite

$r=\frac{C}{2\pi}$

so

r equals StartFraction C Over 2 pi EndFraction

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3 years ago

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Estimate the product of 37 x 62 = ________. Select the equation that correctly represents how to round each factor. (2 points)

irina1246 [14]

It’s the first one 40 times 60

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2 years ago

Which expression is equivalent to the given expression? 2√20 × 4√6

lapo4ka [179]

Answer:

16 sqrt(30)

Step-by-step explanation:

2√20 × 4√6

Multiply

2*4 sqrt(20*6)

8 sqrt(120)

Simplifying

8 sqrt(4 *30)

We know sqrt(ab) = sqrt(a) sqrt(b)

8 sqrt(4) sqrt(30)

8 *2* sqrt(30)

16 sqrt(30)

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3 years ago

In 1998 the population of Canada was 30.3 million. What is that number expanded?

loris [4]

30 300 000 is 30.3 million expanded.

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3 years ago