A runner finished a total of 1,500 kilometers in races before retiring . She finished thirty-two 15-kilometer races . The rest o

Question

3 years ago

8

f her races were 10- kilometer races how many of her races were 10- kilometer races?

1 answer:

mihalych1998 [28] · Answer 1 · 2022-08-14T04:11:10+03:00

102 of runner's races were 10-kilometer races.

Step-by-step explanation:

Given,

Total kilometers finished = 1500 km

Number of 15 km races = 32

Number of 10 km races = x

Therefore;

15*32+10x=1500

$480+10x=1500\\10x=1500-480\\10x=1020$

Dividing both sides by 10

$\frac{10x}{10}=\frac{1020}{10}\\x=102$

102 of runner's races were 10-kilometer races.

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