Answer:
Step-by-step explanation:
6f - 1 + 7f - 8 = 6f + 7f - 1 - 8
= 13f - 9
Combine like terms. Like terms have same variable with same power.
Answer:
4.38
Step-by-step explanation:
12% of 36.51 can be written as;

and then you can solve;
=> 0.12 x 36.51 = x
=> 4.38 = x
<em>Hope this helps!</em>
Let x represent the length in feet of the area along the barn wall. Then the width of the area (out from the wall) will be 450/x, and the total cost of fence will be
cost = 5*(x +2*450/x)
A graphing calculator shows the minimum of the cost function is where x=30.
In order to minimize the cost of fencing, the fourth side should be 30 ft long.
Answer:
D
Step-by-step explanation:
If you multiply something that is a negative number by something that is positive, in this case, the power of 2, then the answer will still be negative. So -5 ^ 2 is negative 25. When you calculate the power of a negative number, then the result depends on the power of the number, so if it's a positive 2 then the answer will be positive.