Answer:
36 White cars
Step-by-step explanation:
total of 40 white cars and yellow cars" means 40 = W + Y
"9 times as many white cars as yellow cars" means 9Y = W
9W + 9Y = 360 (first equation; multiply (W+Y=40) by 9 to eliminate Y)
W - 9Y = 0 (carefully revise the second equation)
------------------- (Elimination method: add the equations)
10W = 360
W = 36 Ans: 36 White cars
Checking (very important):
40 = W + Y
40 = 36 + Y
4 = Y
is 9(4) = 36
36 = 36
Answer:
3:27 4:36 6:54 9:81 10:90
Hopes this helps! :)
A^2+b^2=C^2
13^2+b^2=21^2
169+b^2=441 collect the like terms
b^2=441-169
b^2=272 get the square root of b and 272
b=16.492422
b=16.5 choice B
Answer:
0.7
Step-by-step explanation: (4/5)*7)/8
Hope this helps:)