2 years ago

What two numbers multiply together to equal 15 and add together to equal 8?

Mathematics

2 answers:

Simora [160]2 years ago

8 0

5 times 3 equals 15 and 5 plus 3 equals 8

Kisachek [45]2 years ago

5 0

Answer:

5 and 3

Step-by-step explanation:

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2 years ago

Two times a number plus 3 equals one half of the number plus 30. What is the number please?

Zanzabum

Answer:

Step-by-step explanation:

2*x + 3 = 1/2x + 30 Subtract 3 from both sides

- 3 -3

2x = 1/2x + 27 Subtract 1/2 x from both sides

1/2 x -1/2 x

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2 years ago

What is 5over6 times 5

KATRIN_1 [288]

The answer of this question is 4.1667

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oksian1 [2.3K]

Answer:

$t= 6\ s$

Step-by-step explanation:

We know that the equation that models the height of the ball as a function of time is $h(t) = -16t ^ 2 + 80t + 96$ .

Where the initial speed is 80 feet.

When the ball lands on the ground, its height will be $h(t) = 0$ .

So to know how long it will take the ball to reach the ground, equal h (t) to zero and solve for t.

$-16t ^ 2 + 80t + 96 = 0$

To solve this quadratic equation we use the quadratic formula.

For an equation of the form:

$at^2 +bt +c$

The quadratic formula is:

$t=\frac{-b\±\sqrt{b^2 -4ac}}{2a}$

In this case

$a =-16\\b = 80\\c =96$

Then

$t=\frac{-80\±\sqrt{80^2 -4(-16)(96)}}{2(-16)}$

$t_1=-1\\\\t_2=6$

We take the positive solution

$t= 6\ s$

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