Answer:
x = 12
Step-by-step explanation:
Equation: 0.52(x) + 0.72(4) = 0.57(x + 4)
0.52(x) + 0.72(4) = 0.57(x + 4)
Multiply
0.52x + 2.88 = 0.57x + 2.28
Subtract 0.52x from both sides
2.88 = 0.05x + 2.28
Subtract 2.28 from both sides
0.6 = 0.05x
Divide all sides by 0.05
x = 12
-Chetan K
Answer:

Step-by-step explanation:
Let
h-----> the high of the balloon
we know that
In the right triangle of the figure



It's hard to explain, but theres a trick to it too.
68.82-5.32(sales tax)-3.00=60.5
60.5 divided by 2= 30.25
Each pair of sneakers cost $30.25 each
Use decimals like 6.5 + 6.5= 13