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mylen [45]
3 years ago
13

2x - y = 5 3x + 2y = 4

Mathematics
2 answers:
Serhud [2]3 years ago
5 0

Answer:

x = 2

y = -1

Step-by-step explanation:

Using Substitution: 2x - y = 5           3x + 2y = 4

2x - y = 5                                      

-y = -2x + 5

y=2x - 5

3x + 2 (2x - 5) = 4                        3x + 2y = 4

3x + (4x - 10) = 4                          3(2) + 2y = 4

7x - 10 = 4                                    6 + 2y = 4

7x = 14                                          2y = -2

x = 2                                             y = -1

Ksju [112]3 years ago
3 0

Answer:

x=2 and y=−1

Step-by-step explanation:

2x−y=5

2x−y+−2x=5+−2x

−y=−2x+5

−y

−1

=

−2x+5

−1

y=2x−5

substitute 2x−5 for y in 3x+2y=4

3x+2y=4

3x+2(2x−5)=4

7x−10=4

7x−10+10=4+10(Add 10 to both sides)

7x=14

7x

7

=

14

7

(Divide both sides by 7)

x=2

Substitute 2 for x in y=2x−5:

y=2x−5

y=(2)(2)−5

y=−1(Simplify both sides of the equation)

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frozen [14]

Answer:

ratio of hours lisa works to hours lisa sleeps= 3:8

Step-by-step explanation:

lisa goes to school for 7 hours per day lisa works 3 hours per day

Lisa sleeps 8 hours per day.

For the ratio of hours lisa works to hours lisa sleeps

ratio of hours lisa works to hours lisa sleeps= hours Lisa works/hours Lisa sleeps

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ratio of hours lisa works to hours lisa sleeps= 3:8

4 0
3 years ago
-Ready
Tems11 [23]

The inequality for this situation is given by 50 + p > 85

<h3>What is an inequality?</h3>

An inequality is an expression that shows the relationship between two or more numbers and variables.

Let p represent number of pages from Monday to Friday.

Jerome wants to have read at least 85 pages by the end of the day on Friday, hence:

50 + p > 85

The inequality for this situation is given by 50 + p > 85

Find out more on inequality at: brainly.com/question/24372553

7 0
2 years ago
Simple mathhh help please!!
Neporo4naja [7]

Answer:

A.

Step-by-step explanation:

85/100 = 85%

8 0
3 years ago
Jim leaves the gym running 5 mph. Ten minutes later Bob leaves the gym on his bike traveling at a speed of 8 mph. how long will
podryga [215]

Answer:

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Step-by-step explanation:

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Simplify this by performing the indicated multiplication:

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or:

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7 0
3 years ago
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Need help with this (10 points)
Nikolay [14]

Answer:

5 is greater than equal to 5. So f(5)=5+8=13

Step-by-step explanation:

7 0
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