If he has 9 rows of equal length there are 3 chairs left over.
If he has 7 rows of same length there are 19 left over.
It's important to note that these two setups have the same number of chairs. So we can make an equation out of it.
9x + 3 = 7x +19
2x + 3 = 19
2x = 16
x = 8
So, x (8) is the number of chairs in each row with these setups.
Plug 8 into one of the equations and you will find how many chairs total there are.
9(8) + 3 = 75
There are 75 chairs total
Length (L): 4w - 3
width (w): w
Perimeter (P) = 2L + 2w
34 = 2(4w - 3) + 2(w)
34 = 8w - 6 + 2w
34 = 10w - 6
40 = 10w
4 = w
Length (L): 4w - 3 = 4(4) - 3 = 16 - 3 = 13
Answer: width=4, length = 13
160 flowers
The ratio is 3:5 of white to yellow.
They need 60 white which means they times by 20. So 20x5=100 they will need 100 yellow. In total they need 160
Answer:
17F
Step-by-step explanation:
(-2F) +(19F) = 17F
The signed numbers add in the usual way. (If you really can't do this in your head, a calculator can help.)
