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Setler79 [48]
3 years ago
9

Solve a, b, c, & d please & I will mark you as Brainliest.

Mathematics
2 answers:
laila [671]3 years ago
8 0

Answer:

Step-by-step explanation:

a) -2x-3y=5\\-5x+3y=-40\\-7x=-35\\x=5, y=-5\\\\b)5x+6y=-14\\x-2y=10\\Considering\ equation\ 2,\\3(x-2y)=3(10)\\3x-6y=30\\Hence,\\5x+6y=-14\\3x-6y=30\\8x=16\\x=2, y=-4\\\\c) -3x+3y=21\\-x-5y=-17\\Considering\ equation\ 2,\\3(-x-5y)=3(-17)\\-3x-15y=-51\\Hence, subtracting\ both\ the\ equations\ we\ get,\\-3x+3y=21\\3x+15y=51\\18y=72\\y=4, x=-3

d) Let the cost of one group lesson be x and one private lesson be y

12x+2y=110\\10x+3y=125\\By\ multiplying\ the\ first\ equation\ with\ -1.5\ in\ this\ system\ we\ get,\\-1.5(12x+2y)=-1.5(110)\\-18x-3y=-165\\Hence,\ by\ adding\ both\ the\ equations\ we\ get,\\-18x-3y=-165\\10x+3y=125\\-8x=-40\\x=5,y=25

erica [24]3 years ago
8 0

A,B,C

Step-by-step explanation:

D, 12x + 2y= 110

10x + 3y= 120

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3 years ago
Please help! Will give brainliest
Nina [5.8K]

Answer:

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3 years ago
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Steps for solving 5(2x - 8) = 20 are shown.
kykrilka [37]
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3 years ago
What is the value of |-3.25| And |-4.25|
Yakvenalex [24]

The values are |-3.25| = 3.25  and  |-4.25| = 4.25

<h3>How to determine the values of the expressions?</h3>

The expressions are given as

|-3.25| and |-4.25|

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And as a general rule, an absolute value expression, when evaluated must follow the following rule

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Using the above as a guide, we have

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Also, we have

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Hence, the values of the expressions are |-3.25| = 3.25  and  |-4.25| = 4.25

Read more about absolute value expressions at

brainly.com/question/13282457

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Step-by-step explanation:

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