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motikmotik
2 years ago
7

Solving systems of equations using substitution

Mathematics
1 answer:
Semenov [28]2 years ago
3 0
Put x=-2 in x-y=-2
-2-y=-2
-y=0
y=0
x=-2
that's your answer.
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Please look at picture for question
SCORPION-xisa [38]

Answer:

a=0.62

b=7/9

c=10/9

5 0
2 years ago
What is the solution to this equation ? x + 12 +3x =18 - 2x
olasank [31]

First, you combine like terms: x+3x=4x: 12+4x=18-2x

Second, you add the 2x to each side (inverse operation): 12+6x=18

Third, you subtract 12 from 18 to cancel out the 12 (inverse operation): 6x=6

Fourth, you divide each side by 6 to find the value of x

The answer is x=1

3 0
3 years ago
Read 2 more answers
-140 divided by 5 1/2 then rounded to the nearest 10th of a foot
storchak [24]

Answer:

                                                                                                         

Step-by-step explanation:

8 0
2 years ago
Fill in the blanks people!
MakcuM [25]
I can’t understand what you are asking for
8 0
3 years ago
Suppose a certain outlet chain selling appliances has found that for one brand of stereo system, the monthly demand is 240 when
Doss [256]

Answer: Therefore the demand function can be given as;

q = -3/2p + 1590

Step-by-step explanation:

Given that at;

$900 the monthly demand is 240. ....1

$850 the monthly demand is 315. ....2

Since, the function is a linear function. The demand function would be of the form;

q = mp + c ....5

Where q = quantity demanded

p = price m = slope and c = intercept

Substituting conditions 1 and 2 to the equation.

240 = 900m + c. ...3

315 = 850m+ c ...4

Subtracting eqn 4 from 3

-75 = 50m

m = -75/50

m = -3/2

Substituting m = -3/2 into equation 3;

We have,

240= -3/2(900) + c

c = 240 + 3/2(900)

c = 1590

Therefore the demand function can be given as; substituting m and c into equation 5, we have;

q = -3/2p + 1590

6 0
3 years ago
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