Answer:
D.29
Step-by-step explanation:
all you have to do is replace the x's with -2
4(-2)^2-3(-2)+7=4*4+6+7=16+6+7=22+7=29
Answer:
B. 7 in.
Step-by-step explanation:
Area = A =pi r^2
r^2 = A / pi
r = √(A / 3.14)
= √(153.9 / 3.14)
= 7 in.
1. We assume, that the number 800 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 800 is 100%, so we can write it down as 800=100%.
4. We know, that x is 8% of the output value, so we can write it down as x=8%.
5. Now we have two simple equations:
1) 800=100%
2) x=8%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
800/x=100%/8%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for what is 8% of 800
800/x=100/8
(800/x)*x=(100/8)*x - we multiply both sides of the equation by x
800=12.5*x - we divide both sides of the equation by (12.5) to get x
800/12.5=x
64=x
x=64
now we have:
8% of 800 tons =64 Tons
I hope this helped!!
Since, an inch is to 3 feet, the length would be 18 feet and the width would be 12. To get the area, multiply length and width. The product would be 216 square feet. If a square foot costs $5, 216 square foot multiplied to $5 would be $1080 which is the cost to carpet the room.
Step-by-step explanation:
2 x 10¹⁴ = 200 000 000 000 000 while
4 x 10⁶ = 4 000 000
so 200 000 000 000 000 000 / 4 000 000 = 50 000 000
that means the value of 2 x 10¹⁴ is 5 x 10⁷ times the value of 4 x 10⁶
