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miss Akunina [59]
3 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]3 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]3 years ago
5 0

Answer:

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

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Find inverse of f(x) = 2 + 3x / x - 2
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What of the following is a multiple of 4
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On monday five students make up a rumor. on each of the next two days, every student that knows the rumor tells five other stude
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Answer: 5¹ + 5² + 5³, 130 students

<u>Step-by-step explanation:</u>

  Monday:         1          1           1           1            1        =      5   ⇒ 5¹

+ Tuesday:      1(5)     1(5)       1(5)       1(5)         1(5)     = + 25   ⇒ 5²

+ Wednesday:5(5)    5(5)      5(5)      5(5)        5(5)     = <u>+125   </u>⇒ 5³

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Extra Credit:   How many students will know the rumor on Thursday?            5¹ + 5² + 5³ + 5⁴


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