(6×5)×10=300 Since 6×5=30×10=300
Answer:
f(x)=-6
Step-by-step explanation:
f(0.5) means that x=0.5, so you substitute the x with .5 and multiply it times 2 which will get you 1. Then you subtract 7 to get -6.
Answer:
B) First, find two areas using (4m x 10m = 40m2) and (8m x 3m = 24m2). Next, add (40m2 + 24m2 = 64m2).
Step-by-step explanation:
Samuel should is looking to find the area of his basement in order to cover it with carpet.
An area is calculated by multiplying two dimensions (so answers A and D are not it).
Best solution is to divide the area into two large rectangles then ADD them together to get the total area.
The only scenario where he could have subtracted something based on his plan is if he would have multiplied the 10m by the 12m then subtracted the area that is not part of his basement (7mx8m). He would have achieved the same result of course, but by going a different way.
Answer:
Below in bold.
Step-by-step explanation:
a. h after 4 seconds:
h = -16(4)^2 + 256(4)
= -256 + 1024
= 768 ft
b. When the height is 1008 ft
1008 = -16t^2 + 256t
16t^2 - 256t + 1008 = 0
16(t^2 - 16t + 63) = 0
16(t - 7)(t - 9) = 0
t = 7, 9
So it will take 7 seconds to rise to 1008 feet and and after 9 seconds it will pass 1008 on the way down
So the times are 7, 9 seconds.
c. When the ball reaches the ground h = 0:
-16t^2 + 256t = 0
-16t(t - 16) = 0
t - 16 = 0
t = 16 seconds.
Answer:
Step-by-step explanation:
→ State the gradient formula
( y₂ - y₁ ) ÷ ( x₂ - x₁ )
→ Find x₁ , x₂ , y₁ and y₂
x₁ = 4 , x₂ = 12 , y₁ = 9 and y₂ = 20
→ Substitute in the values
→ Simplify
