So average=(total of scores)/(number of tests)
needs at least average of 70
at least is represented as greater than or equal to or the sign (<u>></u>)
70<u>></u>(total)/(number oftests)
since we have 3 tests, we have to have 3 scores so
70<u>></u>(x+y+z)/3
he scored 85 and 60
70<u>></u>(x+85+60)/3 (doesn't matter which to subsitute)
70<u>></u>(x+145)/3
multiply obht sides by 3
210<u>></u>x+145
subtract 145 from both sides
65<u>></u>x
he needs to get at leas 65 on his third test
12 inches in a foot.
6in+2in+4in+6in= 18in (one and half feet)
3+8+2+1= 14 feet
The answer is 14 feet 6 inches.
I hope this helps!
~kaikers
Subtract 3 from y you get 6(-y)
6*y=6y
