Answer:
a) 13
b) 13
c) 37
Step-by-step explanation:
hope this helps
Answer:

Step-by-step explanation:
The given expression is :

We need to write the equivalent expression for the above expression.
Taking like terms together,

So, the equivalent expression is
.
Multiply amount bought by price:
Total = 40 x 0.68 = $ 27.20
Answer:
about %55
Step-by-step explanation:
You can find the answer by dividing the percent number by the whole number:
74/86 ≈ %55
Answer:
-4
Step-by-step explanation:
-129 = 6(7 + 7x) - 3
Distribute the 6 into the parentheses.
-129 = 42 + 42x - 3
Add like terms.
-129 = 39 +42x
Subtract 39 from both sides.
-168 = 42x
Divide 42 from both sides.
-4 = x