What two numbers multiply to -84 and add up to 17

Mathematics

1 answer:

allsm [11]3 years ago

4 0

The two numbers are 21 and -4 because 21×(-4)=(-84). And when you add 21+(-4) you get 17.

You might be interested in

A cylinder has a surface area of 5652 square millimeters. If the diameter of the cylinder is 30 millimeters, what is the height?

o-na [289]

The formula for the surface area of a cylinder is:

$\sf A=2\pi rh+2\pi r^2$

Plug in what we know, use 3.14 to approximate for pi(radius is half the diameter, 30/2 = 15):

$\sf 5652\approx 2(3.14)(15)h+2(3.14)(15)^2$

Simplify:

$\sf 5652\approx 94.2h+1413$

Subtract 1413 to both sides:

$\sf 4239\approx 94.2h$

Divide 94.2 to both sides:

$\boxed{\sf h\approx 45~mm}$

So the height is approximately 45 millimeters.

7 0

3 years ago

Read 2 more answers

For each question answer yes or no and explain

hjlf

Answer:

First One: Yes

Second One: No

Step-by-step explanation:

Direct Variation Formula: y=kx

1. every single on is y=x times 6, fits the formula

2. there is no easy multiplying repeating pattern of how x=y