1) First, you have to add all the 3 pieces of wood
10+7.5+12= 29.5 ft.
Second, you have to add the pieces that he has used
5.2 +6.2= 11.4 ft
Third, you have subtract the used wood from the whole wood to get how many feet he didn't use
29.5 - 11.4=18.1 ft.
I hope it helped. But, sorry don't know how to do number 2.

7 0

3 years ago

If x=2 and y =0 what is the value of x²-y(x-y)-1

dimulka [17.4K]

Answer:

Step-by-step explanation:

x = 2

y = 0

plug in values

$2^2$ - 0(2-0)-1

4- 0(2)-1

4-0-1

4-1

5 0

2 years ago

What is the value of x in the following equation?<br> 2 (x - 4) + 15 = 21

viktelen [127]

The answer would be x=7.

5 0

3 years ago