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miss Akunina [59]
2 years ago
5

Find the solution to the system of equations: x + 3y = 7 and 2x + 4y = 8 1. Isolate x in the first equation: 2. Substitute the v

alue for x into the second equation: 3. Solve for y: 4. Substitute y into either original equation: 5. Write the solution as an ordered pair:
Mathematics
2 answers:
Anettt [7]2 years ago
5 0
X + 3y = 7
x = -3y + 7

2x + 4y = 8
2(-3y + 7) + 4y = 8
-6y + 14 + 4y = 8
-6y + 4y = 8 - 14
-2y = - 6
y = -6/-2
y = 3

x + 3y = 7
x + 3(3) = 7
x + 9 = 7
x = 7 - 9
x = -2

solution is (-2,3)
Finger [1]2 years ago
5 0

Answer:

-2,3. I know this because I got it correct on Edge.

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12345 [234]

Answer:

B

Step-by-step explanation:

You simplify it using radicals.

6 0
3 years ago
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An angle measures 90° less than the measure of a supplementary angle. What is the measure of each angle?
Vanyuwa [196]
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3 years ago
Simplify 6 - (-2) - 3(-5).<br> -11<br> -7<br> 19<br> 23
Sergeeva-Olga [200]
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4 0
2 years ago
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Beginning in 2000, an orchestra increased its ticket price by a constant amount each year until 2010.
Scilla [17]

Answer:

$35.50

Step-by-step explanation:

55.50-48= 7.5

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6 0
2 years ago
Find the common difference for the arithmetic sequence. 1.7, 2.7, 3.7 4.7.....
Anni [7]

Answer:

Step-by-step explanation:

You do not need to where the formula comes from but, just for fun, here’s a hint

To add up the numbers 1 to 10

Write out the numbers

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Write them backwards

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Add up both lists

11  11  11  11  11  11  11  11  11 11

This is 10 × 11 = 110

But this is twice the sum as two lots were added together

So the sum of the numbers 1 to 10 is 110 ÷ 2 = 55

 

ArSeqSum Notes fig4, downloadable IGCSE & GCSE Maths revision notes

5 0
3 years ago
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