5. To pass a course with an A grade a student must have an average of 90 or greater. A student's grades on three tests are 83,96, and 85 Find what score the student must get on the next test to get an A average What grade must the student get? blank or greater

x  ≥ 96

Step-by-step explanation:

Let x be the fourth score

To find the average add up all the scores and divide by 4

We want to score to be 90 or higher

( 83+96+85+x) /4≥ 90

Multiply both sides by 4

( 83+96+85+x) /4 *4≥ 90*4

( 83+96+85+x) ≥ 360

Combine like terms

x+264 ≥360

Subtract 264 from each side

x+264-264 ≥360 -264

x  ≥ 96

The student needs a 96 or greater.

bn,mn,n.vn.

step-by-step explanation:

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.