2 years ago

3. Simplify the expression:1+4(2x - 3)-xA. 9x - 3B. 9x - 15C. 7x - 2D. 7x - 11

Mathematics

1 answer:

OLga [1]2 years ago

5 0

1+4(2x - 3)-x

Mutiply the bracket by 4

1+ (4)(2x)(4)(-3)-x

1+8x-12-x

8x-x+1-12 just rearranging

7x-11

Answer : D. 7x - 11

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a leaf hangs from a branch 12 feet in the air. it falls to the ground at a rate of 0.25 feet per second. which graph could repre

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For this case we have an equation of the form:
$h (t) = (1/2) * (a) * (t ^ 2) + v0 * t + h0
$
Where,
h0: initial height
v0: initial speed
a: acceleration
Substituting values we have:
$h (t) = (1/2) * (- 32) * (t ^ 2) + 0.25 * t + 12
$
Rewriting we have:
$h (t) = -16t ^ 2 + 0.25 * t + 12
$
Note: see attached image
Answer:
$h (t) = -16t ^ 2 + 0.25 * t + 12$