31) On December 1, a 350-gallon oil tank was full. On January 15, it was 1/4 full. How many gallons of fuel were used in that time period? A. 275
B. 250
C. 262.5
D. 325

  262.5 gallons

Step-by-step explanation:

The amount used is the difference between the starting and ending amounts:

  350 -(1/4)(350) = 262.5 . . . . gallons used

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

yeeeet

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.