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julsineya [31]
4 years ago
8

Which properties justify the steps taken to solve the system?

Mathematics
1 answer:
Shalnov [3]4 years ago
8 0
For the first entry, given in the photo, we multiply the second equation by -2. This property is the multiplication property of equality (1). 

Then, we add the two equations generated. (2) addition property of inequality.

Next, we divide both sides of the equation by 13. That is division property of inequality. 

Moreover, we substitute the value obtained for y in the first equation. This is substitution property of equality. 

Then, we simplify

Next, we add +3 to both sides of the equation in order to have an equation with only one side having a variable. That is addition property of equality. 

Lastly, we divide both sides of the equation by 4. This is division property of equality. 
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Evaluate -4|-4|.<br> 0-8<br> 8<br> 16<br> -16
fenix001 [56]

9514 1404 393

Answer:

  -16

Step-by-step explanation:

The absolute value function gives the positive value of the argument, so this is ...

  -4|-4| = -4·4 = -16

4 0
3 years ago
A line passes through the point (0, –1) and has a slope of -2/3 What is the equation of the line?
Troyanec [42]
The slope formula:
y=mx+b
m - a slopeb - y-intercept
We have:
m=-\dfrac{2}{3} and point (0;-1)\to b=-1
Substitute:
y=-\dfrac{2}{3}x-1
Answer: A.

6 0
3 years ago
Find the slope of the line through each pair of points (-17, 11) , (-12, 9) 
ad-work [718]

Answer:

M = -2/5

Step-by-step explanation:

To find the slope of a line when you know two points, use the following formula.

M = y₂ - y₁ ÷ x₂ - x₁

M = 9 - 11 ÷ -12 - (-17)

M = -2 ÷ 5

M = -2/5

Hope that helps.

3 0
3 years ago
Let f(x) = x^2 +5 and G (x) = X+5/x. Find (gof)(-3)
tamaranim1 [39]
(gof)(-3) means the composition of two functions at x = -3.

(gof)(-3) can also be expressed as g(f(-3))

So, first we find f(-3)

f(x) = x² + 5

f(-3) = 9 + 5 = 14

g(f(-3)) = g(14)

g(14) = (14+5)/14 = 19/14

Thus, option C gives the correct answer
5 0
4 years ago
Whats an equivalent fraction to 4/8=
padilas [110]
The fraction is equivalent to 1/2 since you can simplify 4/8 as (4/4)/(8/4) = 1/2.
7 0
3 years ago
Read 2 more answers
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