2 years ago

Which expression is equivalent to 18 − 20?

1 answer:

6 0

The answer is 18+(-20) because if if you were going to solve that equation you would use the absolute value of -20 and then the opposite of the sign giving you 18-20. Hope this helps:)

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Which represents a side length of a square that has an area of 450 square inches?

geniusboy [140]

Answer:

21.213 inches

Step-by-step explanation:

A square area is side times side. each side is same length

square root of 450 is approx. 21.213

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2 years ago

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What was the average speed if I drove 60 miles per hour to get to my grandmas house and 30 miles per hour to get home. Represent

siniylev [52]

Answer:

40 mph.

Step-by-step explanation:

Suppose grandma's house is 30 miles away (any distance would do but 30 is convenient).

Speed = distance / time

time = distance / speed

Time to get there = 30/60 = 1/2 hour.

Time to get back = 30/30 = 1 hour

Average speed = total distance/ total time

= (30 + 30) / ( 1 + 1/2)

= 60 / 1.5

= 40 miles per hour.

You cannot take the average of the speeds directly

(60+ 30)/2 = 45 is not correct as you cannot average ratios ( speed is a ratio).

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2 years ago

12 9/150 as a decimal?

hichkok12 [17]

$12 \frac{9}{150}=12 \frac{9 \div 3}{150 \div 3}=12 \frac{3}{50}=12\frac{3 \times 2}{50 \times 2}=12 \frac{6}{100}=\boxed{12.06}$

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2 years ago

Which statement about this figure is true?

kirza4 [7]

Answer:

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Step-by-step explanation:

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1 year ago

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This question has two parts. First, answer Part A. Then, answer Part B.

ss7ja [257]

Answer:

Step-by-step explanation:

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