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3 years ago

Solve the system of equations using addition.

Mathematics

1 answer:

lutik1710 [3]3 years ago

4 0

Answer:

A. (-3,-6)

Step-by-step explanation:

The explanation is in the pictures.

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Please help!!! I will give brainliest but only if you try and help.

Slav-nsk [51]

Answer:

Since we have to predict, we can use ratios to help us solve this.

12 said yes out of 72 randomly chosen, SO,

if 210 would say yes (goes to play), how many is total??

12 is to 72 AS 210 is to HOW MUCH (let it be x)??

We can setup ratio, cross multiply, and solve for x:

= 12/72= 210/x

= 12x = 210*72

=12x = 15,120

=x = 15,120/12

8 0

2 years ago

A. –30<br><br> B .–19<br><br> C. –22<br><br> D. –10

elena-s [515]

Answer:

-30

Step-by-step explanation:

substitute the values and get -30

5 0

2 years ago

Read 2 more answers

HELP Me NOW NOW NOW NOW

german

Answer:

The answer is 9/16.

Step-by-step explanation:

Using Indices Law,

${( \frac{a}{b}) }^{n} ⇒ \frac{ {a}^{n} }{ {b}^{n} }$

So for this question :

${ (\frac{3}{4}) }^{2}$

$= \frac{ {3}^{2} }{ {4}^{2} }$

$= \frac{3 \times 3}{4 \times 4}$

$= \frac{9}{16}$

7 0

3 years ago

What is an equivalent to -16m^2n-(-25m^2n)+(-7m^2n)

pantera1 [17]

Answer:

The equivalent expression is:

$-16m^2n-\left(-25m^2n\right)+\left(-7m^2n\right)=2m^2n$

Step-by-step explanation:

Given the expression

$-16m^2n-\left(-25m^2n\right)+\left(-7m^2n\right)$

$\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a,\:-\left(-a\right)=a$

$=-16m^2n+25m^2n-7m^2n$

$\mathrm{Add\:similar\:elements:}\:-16m^2n+25m^2n-7m^2n=2m^2n$

$=2m^2n$

Therefore, the equivalent expression is:

$-16m^2n-\left(-25m^2n\right)+\left(-7m^2n\right)=2m^2n$

7 0

2 years ago

Which two lines are parallel?

GaryK [48]

Answer:

First turn 3x + y = -5 to slope-intercept form (y=mx+b) by subtracting 3x in order to move it to the other side, to get

y = -3x - 5.

So now you have all three lines in proper slope-intercept form. (Don't worry about

y = 7 - 3x, it's still in slope-intercept form, despite the y-intercept and slope being swapped.)

<u>Here are the lines rewritten below</u>.⤵⤵⤵

1. y = -3x - 5

2. y = -3x + 7 or y = 7 - 3x (either way works)

3. y = -3x + 2.5

As we can see, all three lines are parallel.

Because all the slopes are the same and the y-intercepts are different. If the slopes were different, the lines wouldn't be parallel.

I also graphed the lines above, so you can see what I mean.⤴⤴⤴ Hope this helped :)

4 0

2 years ago