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kifflom [539]
3 years ago
7

Solve the system of linear equations by substitution.

Mathematics
2 answers:
natali 33 [55]3 years ago
8 0
Plug in -x+9 in for y and you should get (2,7)
Goryan [66]3 years ago
6 0

Answer:

hey! This was the only part of mathematics I ever enjoyed! So consider this both of our lucky days: Answer is : (2,7)

Step-by-step explanation:

basically plug in Y to the first equation as sox + 4(-x + 9) = 30

x - 4x + 36 = 30- 3x = - 6

x = 2

then plug that in to Y!

Y = -(2) + 9

so Y = 7

and our answer is : (2,7)

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Harry purchased some fruits and sold 1/2 of them at a gain of 60% and 1/4 of them at a gain of 20%, the rest were spoiled. Find
kherson [118]

Answer: 35%

Step-by-step explanation:

Let the original price be "4x".

60% gain on 1/2 of them will be:

(1.60 × 2x) = 3.2x - 2x = 1.2x

20% gain on (1/4) of them will be:

(1.2 × x) = 1.2x - x= 0.2x

Total gain 1.2x + 0.2x = 1.4x

Total gain percent= Gain/Original price =1.4x/4x = 0.35 = 35%

5 0
3 years ago
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Which ordered pair is a solution to the system of linear equations below?<br> y= 1/4x+2<br> y= x-1
adelina 88 [10]

Answer:

The answer is (4,3)

Step-by-step explanation:

Use desmos graphing calculator, find the points where they meet. Search desmos on google and click on the first link.

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3 years ago
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bazaltina [42]
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The design on Santana’s wall includes 16 pink stripes and 20 green stripes. Find the ratio of pink stripes to green stripes.
tia_tia [17]
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Find the solution to the set <br> b^2+12b=0 <br> use a comma
shepuryov [24]
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b=-12,0
5 0
3 years ago
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