Steve has quiz scores of 60,64,75,71. if all the quizzes count the same, what is the lowest grade he can make on the next quiz to have an average score of 70? how do i solve this problem

The last quiz score must be at least an 80 to get the average to be a 70.

Step-by-step explanation:

In order to find this, you need to take the average of the 4 test scores along with the unknown test score (x). So, to find an average, we add all the numbers together and divide by the amount of tests taken. We can then set this equal to 70 since that is the minimum average.

(60 + 64 + 75 + 71 + x)/5 = 70 > Multiply both sides by 5

(60 + 64 + 75 + 71 + x) = 350 > Combine like terms

270 + x = 350 > Subtract 270 from both sides

x = 80

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.