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DanielleElmas [232]
3 years ago
9

4. Seven times the difference of a number k and five is twenty-onel

Mathematics
1 answer:
laila [671]3 years ago
4 0

Answer:

k = 8

Step-by-step explanation:

7(k - 5) = 21

k - 5 = 3

k = 8

Hope this helps!

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there is no diagram here.

I assume that the race track is a rectangle in the middle and two half-circles at the left and right ends, and that the length of the rectangle is D = 2R. which makes the rectangle actually a square, as the width is the diameter of the (half-)circles, which is also 2R.

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