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3 years ago

PLEASE HELP ME WITH THIS QUESTION.

Mathematics

2 answers:

ludmilkaskok [199]3 years ago

5 0

The answer is B

-b/2(a) = x
That is the time when the ball hits the ground

Gwar [14]3 years ago

5 0

Answer:

The ball hits the ground after 7.6 sec.

Step-by-step explanation:

Realize that h = 0 when the rocket hits the ground. Thus, we set h(t) = y = to 0 and solve for time (t):

y = 0 = h(t) = -16t^2 + 113t + 65.

Application of the quadratic formula is the easiest approach here. Note that a = -16, b = 113 and c = 65.

The discriminant is b^2-4ac, or, in this case, 113^2 - 4(-16)(65) = 16929.

Because the discriminant is positive, we confirm that this equation has two real, unequal roots.

The time values are as follows:

-113 ± √16929

t = --------------------- = -17.11/ (-32) sec, which we must reject

-32

because time in

this situation may not be (-).

The other root is:

-113 ± √16929

t = --------------------- = 7.6 sec

-32

The ball hits the ground after 7.6 sec.

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see the explanation

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A parallelogram: A Parallelogram is a flat shape with opposite sides parallel and equal in length. Opposite angles are congruent and consecutive angles are supplementary

If the parallelogram have two opposite angles equal to 105°, then the measure of each of the other two congruent interior angles must be equal to

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A rhombus: A Rhombus is a flat shape with 4 equal straight sides. A rhombus looks like a diamond. All sides have equal length. Opposite sides are parallel. Opposite angles are congruent and consecutive angles are supplementary

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