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kvasek [131]
3 years ago
12

If you could do question 9 I would be so thankful. Use substitution. No one is helping me, please help

Mathematics
2 answers:
igor_vitrenko [27]3 years ago
6 0

Answer:

-3*(x-2y+4=0)

5x-6y+18=0

-3x+6y-12y=-3

5x-6y+18=0

2x+6=-3

2x=-9

X= -4.5

Step-by-step explanation:

insens350 [35]3 years ago
4 0

Answer:

step 1. x = 2y - 4 on the 1st equation

step 2. 5(2y- 4) - 6y +18 = 0 plug x from 1st equation into the 2nd equation

step 3. 10y - 20 - 6y + 18 = 0

step 4. 4y - 2 = 0

step 5. y = 1/2

step 6. x = -3 plug y into 1st equation

step 7. (-3, 1/2) is the answer.

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The grades for 200 students at a middle school are represented in the graph below how many more students earned Cs then Ds
Xelga [282]

Answer:

B. 60

Step-by-step explanation:

There are a total of 200 students here, and 45% got Cs, to find how many got Cs, multiply 200 by 45%, or 0.45: 200*0.45 = 90, 90 people got Cs.

15%  got Ds, multiply 200 by 15%, or 0.15 to get 30, 30 got Ds

The amount who got Cs minus the amount who got Cs is 90 - 30 = 60, 60 more students got Cs than Ds

3 0
3 years ago
Please solve this -10+1/3y>2/3
Marianna [84]

Solving -10+\frac{1}{3}y>\frac{2}{3} we get y>32

Step-by-step explanation:

We need to solve the expression:

-10+\frac{1}{3}y>\frac{2}{3}

Solving the expression

Adding 10 on both sides:

-10+\frac{1}{3}y>\frac{2}{3}\\=-10+\frac{1}{3}y+10>\frac{2}{3}+10\\=\frac{1}{3}y>\frac{2+30}{3}\\=\frac{1}{3}y>\frac{32}{3}\\

Multiplying 3 on both sides

=\frac{1}{3}y\times3>\frac{32}{3}\times3\\=y>32

So, Solving -10+\frac{1}{3}y>\frac{2}{3} we get y>32

Keywords: Solving Inequality

Learn more about solving inequality at:

  • brainly.com/question/9590016
  • brainly.com/question/1465430
  • brainly.com/question/4192226

#learnwithBrainly

3 0
3 years ago
Can someone pls help me
olga55 [171]

32-20 = 12

14-2 = 12

 so the input is 12 more than the output

so 6+12 = 18

and

-10-12 = -22


4 0
4 years ago
Read 2 more answers
How can you solve an equation or inequality in one variable?
zimovet [89]

In order to solve an equation for a variable, we need to isolate that variable on one side of the equation (either left side or right side).

Following are some steps to solve equation/inequality in one variable:

1) Get rid constant number from on side by applying reverse operation of addition or subtraction.

2) Get rid variable terms from other side by applying reverse operation of addition or subtraction.

3) Combine like terms on both sides.

4) Get rid any coefficent ( a number in front of a variable) by dividing from both sides.

5) Finally you get a variable on one side and solution on other side.

4 0
3 years ago
Would anybody give the right answer
BARSIC [14]

Answer:

i think so

Step-by-step explanation:

8 0
2 years ago
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