Answer:
78
Step-by-step explanation:
Let x be the score on the next test
We are averaging 6 tests and want an average of 75
( 82+91+38+78+83+x) /6 = 75
Multiply each side by 6
( 82+91+38+78+83+x) = 75*6
( 82+91+38+78+83+x) =450
Combine like terms
x+372 = 450
Subtract 372 from each side
x+372-372 = 450-372
x =78
Answer:
RT = 9
Step-by-step explanation:
x-2 + 4x-9 = x+5
5x-11 = x+5
subtract the x from the right side to 5x and the left side x cancels out
add 11 on the right side which cancels out and add to right side
4x = 16
divide 4x by 4 which cancels out and divide 16 by 4
x = 4
take the equation for RT = x+5
yk x = 4 so that makes 4+5 which is equal to 9
38000 you should use a calculator.
