Ask question

Ask question

All categories

4 years ago

9

What two numbers multiply to -180 and adds to 8?

2 answers:

ratelena [41]4 years ago

5 0

First, find the multiples of 180...
1 and 180
2 and 90
3 and 60
4 and 45
5 and 36
6 and 30
9 and 20
10 and 18
12 and 15

Then. using those, find two that work to add up to 8. Keep in mind that one of the factors must be negative, as 180 in this problem is negative.
Hence... -10 + 18 = 8

The two numbers you are looking for are -10 and 18.

Setler [38]4 years ago

3 0

They make 8 together it would be 8 for the answer ^_^

You might be interested in

Find the value of x

valina [46]

Answer:

picture is blurry

Step-by-step explanation:

7 0

4 years ago

Please help me:) thanks

nika2105 [10]

Answer:

B. Side <em>a</em> is 7 inches long and side <em>b</em> is 6 inches long.

Step-by-step explanation:

Since the scale drawing is three times bigger than the actual object, divide both numbers by three to find the object size.

Side a:

21/3 = 7 inches

Side b:

18/3 = 6 inches

6 0

3 years ago

Read 2 more answers

Genrish500 [490]

Given

$a\sqrt{x+b}+c=d$

we have

$\sqrt{x+b}=\dfrac{d-c}{a}$

Squaring both sides, we have

$x+b=\dfrac{(d-c)^2}{a^2}$

And finally

$x=\dfrac{(d-c)^2}{a^2}-b$

Note that, when we square both sides, we have to assume that

$\dfrac{d-c}{a}>0$

because we're assuming that this fraction equals a square root, which is positive.

So, if that fraction is positive you'll actually have roots: choose

$a=1,\ b=0,\ c=2,\ d=6$

and you'll have

$\sqrt{x}+2=6 \iff \sqrt{x}=4 \iff x=16$

Which is a valid solution. If, instead, the fraction is negative, you'll have extraneous roots: choose

$a=1,\ b=0,\ c=10,\ d=4$

and you'll have

$\sqrt{x}+10=4 \iff \sqrt{x}=-6$

Squaring both sides (and here's the mistake!!) you'd have

$x=36$

which is not a solution for the equation, if we plug it in we have

$\sqrt{x}+10=4 \implies \sqrt{36}+10=4 \implies 6+10=4$

Which is clearly false

7 0

4 years ago

Simplify the following completely, show all work. √-45

scoray [572]

Answer:

$3\sqrt{5}i$

Step-by-step explanation:

$\sqrt{-45}$

$\sqrt{-9*5}$

$\sqrt{-9}\sqrt{5}$

$3i\sqrt{5}$

$3\sqrt{5}i$

7 0

3 years ago

Please help, the question is in the picture.

Talja [164]

Step-by-step explanation:

answer is first option,,,

6 0

3 years ago