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2 years ago

Evaluate the expression when a=-15 and b=-5. b^2 / a + 5

1 answer:

3 0

Answer: 20/3

Solution:

-5^2/-15 + 5
Determine the sign

5^2/15 + 5
Calculate

25/15 + 5
Simplify

5/3 + 5
Transform the expression

5 + 15/3
Calculate

= 20/3

(But there’s alternative forms too!: 6.6, 6 2/3)

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hodyreva [135]

Answer:

59.8*4=239.2 rounded to the nearest foot is 239

Step-by-step explanation:

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3 years ago

An engineer is designing a fountain that shoots out drops of water. The nozzle from which the water is launched is 3 meters abov

Hoochie [10]

Answer:

After 3 seconds

Step-by-step explanation:

Given

$h(t) = -5t^2 + 14t + 3$

Required

Time the drop will hit the ground

When the drop hits the ground,

$h(t) = 0$

So, we have:

$0 = -5t^2 + 14t + 3$

Rewrite as:

$5t^2 - 14t - 3 = 0$

Expand

$5t^2 + t - 15t - 3 = 0$

Factorize

$t(5t + 1) -3(5t + 1) = 0$

Factor out 5t + 1

$(t -3)(5t + 1) = 0$

Split

$t -3 = 0$ or $5t + 1 = 0$

Solve for t

$t = 3$ or $5t = -1$

Time cannot be negative.

So:

$t = 3$

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3 years ago

There are three car salespeople at the local car dealership. The table below shows how many cars each salesperson has sold. Help

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Answer:

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Step-by-step explanation:

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7 0

3 years ago

Read 2 more answers

The ratio of books to magazines at jess house is 5:3 they are 21 magazines at jess house how many books are there?

TiliK225 [7]

First, 5/3 = 1.6
21 x 1.6 = 34.99999999
But, when I put it in a calculator, the 1.6 was repeated so:
Round 34.99999999 to 35
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2 years ago

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HELP PLZ PICK ONE OF THE ONES SHOWN:

defon

I am doing with Question Number 2

Let the two numbers be 'x' and 'y'.

According to the question, the product of two numbers is 14.

$x \times y=14$

So, xy=14 (Equation 1)

Now, one of the numbers is 3 ½ times the other.

So, $x = 3\frac{1}{2}\times y$

$x=\frac{7}{2}y$ (Equation 2)

Substituting the value of 'x' from equation 2 in equation 1, we get

$\frac{7}{2}y \times y = 14$

$\frac{7}{2}y^{2} = 14$

$y^{2} = 4$

So, y= 2 and -2

So, $x=\frac{14}{2}$ and $x=\frac{14}{-2}$

x=7 and -7

Numbers are 2,7 and -2,-7.

Sum of numbers 2 and 7 = 9

Sum of numbers -2 and -7 = -9.

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3 years ago

Evaluate the expression when a=-15 and b=-5. b^2 / a + 5​

Evaluate the expression when a=-15 and b=-5. b^2 / a + 5