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Margarita [4]
3 years ago
15

{y=2x+14 {−4x−y=4 What can I substitute for "y" in the equations?

Mathematics
1 answer:
romanna [79]3 years ago
8 0
Since y = 2x + 14 you can substitute (2x + 14) for y in the second equation
-4x - (2x + 14) = 4.

This is an equation with only one variable so you can solve it for x.  Then use that answer to find the value for y.

Distribute the subtraction sign throughout the terms in the ()s.
-4x - 2x - 14 = 4
-6x - 14 = 4            This is how I got -6x:  -4x - 2x = -6x (combine like terms)
-6x -14 + 14 = 4 + 14   This will eliminate -14
-6x = 18      Now divide both sides by -6
x = -3
y = 2(-3)+14 = 8
Solution to the system is (-3, 8)

ANSWER TO YOU QUESTION: you can substitute (2x + 24) for y 
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Find the missing factor
Yuki888 [10]

Answer:

The missing factor is (9s+1)

Step-by-step explanation:

The missing factor is (9s+1) because of the following

(9s^2 + s) + (18s+2)

If we factor out s from 9s^2+s, we get s(9s+1).

If we factor out 2 from 18s+2, we get 2(9s+1)

putting these together, we get s(9s+1) + 2(9s+1). Factoring out the common term of 9s+1, we get (9s+1)(s+2). therefore, the missing factor is 9s+1

4 0
3 years ago
How do I do this -9 - 16m = 7? What are the steps?
nordsb [41]

m = -1

Step-by-step explanation:

-16m = 7 + 9

-16m = 16

m = 16 ÷ -16

m = -1

4 0
3 years ago
Luis wanted to buy a skateboard that usually sells for $79.99. All merchandise is discounted by 12%. What is the total cost of t
Oliga [24]
<span>79.99/6.75%=5.399325 if you want the exact but 5.40 if you want rounded</span>
8 0
3 years ago
Solve the literal equation for the indicated variable. Show your work.<br><br> P=2(l+w) for l.
Norma-Jean [14]

Answer:

l = P/2  -w

Step-by-step explanation:

P=2(l+w)

Divide each side by 2

P/2 = 2(l+w)/2

P/2 = l+w

Subtract w from each side

P/2 -w = l+w-w

P/2 -w =l

3 0
2 years ago
Find the distance between the points L(7,-1) and M(-2, 4).
zysi [14]

Answer:

The answer is

\sqrt{106}  \:  \:  \: or \:  \:  \: 10.3 \:  \:  \:  \: units

Step-by-step explanation:

The distance between two points can be found by using the formula

d =  \sqrt{ ({x1 - x2})^{2} +  ({y1 - y2})^{2}  } \\

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

L(7,-1) and M(-2, 4)

The distance between them is

|LM|  =   \sqrt{ ({7 + 2})^{2}  + ( { - 1 - 4})^{2} }  \\  =  \sqrt{ {9}^{2}  +  ({ - 5})^{2} }  \\  =  \sqrt{81 + 25}  \\  =  \sqrt{106}  \:  \:  \:  \:  \:  \:  \:  \\  = 10.29563014...

We have the final answer as

\sqrt{106}  \:  \:  \: or \:  \:  \: 10.3 \:  \:  \:  \: units

Hope this helps you

4 0
2 years ago
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