A school year has 4 quarters. what percent of the school year is 7 quarters?

175%

Step-by-step explanation:

You "have" 7/4 quarters, which, when you divide 7 by 4, gives you 1.75.

This is only a ratio (1.75 out of 1 whole), so to get it into percentage you need to multiply 1.75 by 100, giving you 175 percent.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

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