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shtirl [24]
3 years ago
8

What is the solution to the system of equations? Use the linear combination method.

Mathematics
1 answer:
Korolek [52]3 years ago
3 0
1. {2x−3y=9
{3x+5y=4

2. {(2x−3y=9)×5
{(3x+5y=4)x3

3. {10x-15y=45
{9x+15y=12

4. (10x-15y=45) + (9x+15y=12)= (19x=57)

5. (19x=57)÷19

6. x=3

7. 2(3)-3y=9

8. 6-3y=9

9. -3y=9-6

10. (-3y=3)÷(-3)

11. y=-1

Answer: x=3 and y=-1
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I also really need help with this question.
Alik [6]

Answer:

The answer would be -12

Step-by-step explanation:

I hope this helps! Have an awesome day.

3 0
3 years ago
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24 1/4 - 15 1/2 I really need help with this
Mamont248 [21]

first, you must make the fractions have the Least Common Denominator, which in this case is 4. the new equation is 24 1/4 - 15 2/4. then you just subtract. the answer is <u>8 3/4</u>
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4 years ago
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A store that buys and sells used video games buys a game at a cost of ​$9 and sells it at a selling price of ​$13. Find the mark
Bingel [31]
Markup = $4
b) markup as a percentage of cost is 33.3%
Step-by-step explanation:
Markup
markup = selling price - cost
= $13 - 9
... markup = $3
Markup as a Percentage of Cost
To find the percent markup, divide the markup by the reference value and multiply the ratio by 100%. The reference value for markup is usually cost price, but sometimes may be selling price.
... markup / cost × 100% = 3/9×100% = 33 1/3% ≈ 33.3%
4 0
3 years ago
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Ivan and Jeff buy a package of 8 pens for $4.00. Ivan wants 5 of the pens, and Jeff wants 3. How much should each student pay? S
ale4655 [162]

Answer:

Ivan should Pay $2.50 And Jeff should pay $1.50

Step-by-step explanation:

So this is a ratio questions basically.

We're sharing the pens in the ration 5:3

$4.00 / 8 = $0.50

$0.50 x 5 = £2.50

$0.50 x 3 = $1.50

5 0
3 years ago
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PLEASE HELP! I will mark you Brainlest if you answer correctly and the fastest. It doesn’t give me the option to mark someone Br
Vesnalui [34]

Answer:

Any point has form P(x,y).

Then

AA' = ( A'x -Ax, B'y- By ) = (2-3, 3- (-4))=(-1,7)

=>A' is image of A under translation: 1 to the left (-1), 7 up(+7)

4 0
4 years ago
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