10 times because 90 divided by 10=9
The total number of cars both the student and the teacher made is 49
let
total cars = x
cars made by student = s
cars made by teacher = t
Total = student + teacher
x = s + t
s = 2/7x
So,
x = 2/7x + t
x - 2/7x = t
t = (7x - 2x) / 7
t = 5/7x
Similarly,
s = t - 21
s = 5/7x - 21
equate both s equation
2/7x = 5/7x - 21
2/7x - 5/7x = -21
(2x - 5x) / 7 = -21
- 3/7x = -21
x = -21 ÷ -3/7
= -21 × - 7/3
= (-21 × -7) / 3
= 147/3
x = 49
Therefore, the total number of cars both the student and the teacher made is 49
Learn more about fractions:
brainly.com/question/11562149
The answer is 76. Split this into two rectangles, a lower and an upper.
The upper one has dimensions of 5, 4, and 2
SO its volume is 5*4*2 or 40
The lower one has dimensions of 6, 3, and 2
So its volume is 6*3*2 or 36
40+36=76
Hope this helps<span />
Answer:
What does that even mean?