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IrinaK [193]
3 years ago
7

Perform the distribution: (x-7)(2x-4)

Mathematics
1 answer:
dsp733 years ago
5 0

Answer:

2x^2 - 18x + 28

Step-by-step explanation:

(x - 7)(2x - 4) =

= (x - 7)(2x) - (x - 7)(4)

= 2x^2 - 14x - 4x + 28

= 2x^2 - 18x + 28

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In a race that consisted of three parts the cycling part was 12 1/2 miles long the running part of the race was won for the dist
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Complete question is;

In a race that consisted of three parts, the cycling part was 12 1/2 miles long. The running part of the race was 1/4 the distance of the cycling part. The kayaking part of the race was 1/2 the distance of the running part. What was the entire distance, in miles of the race?

Answer:

Total distance of race = 17.1875 miles

Step-by-step explanation:

The 3 parts of the race are; cycling, running and kayaking.

The cycling distance was; 12½ miles

We are told that the running part was ¼ of the cycling distance. Thus;

Running distance = ¼ x 12½ = ¼ x 25/2 = 25/8 miles

Lastly, we are told that the kayaking part was ½ the distance of the running part. Thus;

Kayaking distance = ½ x 25/8 = 25/16

Thus,total distance of race = cycling distance + running distance + kayaking distance = 12½ + 25/8 + 25/16 = 17.1875 miles

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3 years ago
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Consider the following formula used to estimate the height, h, of a seeding after w weeks since planting h=(1/5)w + (8/5)which o
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