All categories

3 years ago

What is 9 - (-8) = 20 and how did you get that answer?

Mathematics

2 answers:

mash [69]3 years ago

7 0

Answer:

9 -( -8)= 9 + 8= 17 not 20

17 is the solution

Colt1911 [192]3 years ago

4 0

Answer: No solution

Step-by-step explanation:

9-(-8)=20 given

9+8=20 the two negatives cancel out, making the eight positive

17=20 this statement is not correct, so the answer is no solution

no solution

I'm not sure if there was supposed to be a variable in there somewhere, but I did my best to explain. Hope this helps!

You might be interested in

Use the distributive property to expand -4 (-2/5 + 3 x). Which is an equivalent expression?

Brrunno [24]

Answer:

8/5-12x.

Step-by-step explanation:

To distribute, you simply need to multiply each of the terms inside of the parenthesis by -4. This will give you:

=-4( $\frac{-2}{5}$ )-4(3x)

=8/5-12x. This is your answer!

7 0

3 years ago

Help!! Which of the following best represents Z1 • Z2 select all that apply

AURORKA [14]

$z_1=\sqrt{3}\left(cos\:\frac{\pi }{4}+i\:sin\:\frac{\pi }{4}\right)$

$z_2=\sqrt{6}\left(cos\:\frac{3\pi \:}{4}+i\:sin\:\frac{3\pi \:}{4}\right)$

$\cos \left(\frac{\pi }{4}\right)=\frac{\sqrt{2}}{2}$

$\sin \left(\frac{\pi }{4}\right)=\frac{\sqrt{2}}{2}$

$\cos \left(\frac{3\pi }{4}\right)=-\frac{\sqrt{2}}{2}$

$\sin \left(\frac{3\pi }{4}\right)=\frac{\sqrt{2}}{2}\\$

$Z_1*Z_2=\sqrt{3}\left(cos\:\frac{\pi }{4}+i\:sin\:\frac{\pi }{4}\right)\cdot \sqrt{6}\left(cos\:\frac{3\pi \:}{4}+i\:sin\:\frac{3\pi \:}{4}\right)$

$=\sqrt{3}\left(\frac{\sqrt{2}}{2}+\:i\frac{\sqrt{2}}{2}\right)\cdot \sqrt{6}\left(\frac{-\sqrt{2}}{2}+\:i\frac{\sqrt{2}}{2}\right)$

On simplifying, we get

$Z_1* Z_2 =-3\sqrt{2}$

<h2>Therefore, correct option is 1st option.</h2>

3 0

3 years ago

Estimate the difference by rounding to the nearest hundred 3860-2757

makkiz [27]

Answer:

1,100 is the answer.

Step-by-step explanation:

Since the difference of the subtraction problem is 1,103, when it is rounded, it becomes 1,100.

8 0

3 years ago

Sharon drops a rubber ball from a height of 160 feet. Every bounce sends the

spayn [35]

Answer:

140 feet

Step-by-step explanation:

If the first time she dropped the ball was from 160 feet then the second time she dropped the ball is would bounce back up 80 feet. The third time it would bounce 40 feet. And the 4th time it would bounce 20 feet

So the total distance the ball traveled from the first time it hit the ground is 140 feet

I'm not 100% sure I understand the question but I tried

7 0

3 years ago

If John owes 300 dollars and pays 50 a week what are the dependent and independent variables

podryga [215]

300 dollars would be the independent variable and 50 dollars a week is dependent

7 0

3 years ago