54 5 270
------- × ------- = --------- = 45
1 6 6
28 2 56
------- × ------ = ------- = 8
1 7 7
1. let’s solve for x.
x+2y=12
step 1: add -2y to both sides.
x + 2y + -2y = 12 + -2y
x = -2y + 12
answer: x = -2y + 12
Answer:
21.75
Step-by-step explanation:
if you take 87 divided by 2/3, you get 130.5, which is the total amount of money he makes in 6 weeks. but if you take 130.5 divided by 6, you get 21.75 which is how much he makes weekly.
Answer:
A. 10 m wide and 20 m long
B. Smaller
C. 5 cm wide and 10 cm long
Step-by-step explanation:
Suppose that the scale drawing of a swimming pool is 10 cm wide and 20 cm long (see first figure attached).
A
If 1 cm represents 1 m, then 10 cm represents 10 meters and 20 cm represents 20 meters. So, the actual long of the swimming pool is 20 m and the actual wide is 10 m.
B
Knowing that 1 cm represents 2 m, then the next proportion let us calculate how many cm represent 10 m.
1/2 = x/10
(1/2)*10 = x
5 = x
So, 5 cm represents 10 m. In the same way, we can get that 10 cm represents 20 m. Consequently, the new draw will be smaller.
In general, because now 1 cm represents more meters, there less centimeters are needed to represent the same meters as before.
C
See the second figure attached.