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HACTEHA [7]
3 years ago
5

How do you solve -3x+y=7 5x+2y=3 by substitution method??

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0
Yes you would have to solve this problem by substitution method
lakkis [162]3 years ago
8 0

Answer:

(-1,4)

Step-by-step explanation:

-3x + y = 7......y = 3x + 7

so sub in 3x + 7 in for y back into the other equation

5x + 2y = 3

5x + 2(3x + 7) = 3 ...distribute thru the parenthesis

5x + 6x + 14 = 3....subtract 14 from both sides

5x + 6x = 3 - 14...combine like terms

11x = - 11...divide both sides by 11

x = -11/11

x = -1

now that we know x = -1, we can sub that back into either of the original equations to find y

y = 3x + 7

y = 3(-1) + 7

y = -3 + 7

y = 4

so we have (-1,4) as a solution....but lets check it first

-3x + y = 7

-3(-1) + 4 = 7

3 + 4 = 7

7 = 7 (correct)...it checks out

so ur solution is : x = -1 and y = 4 or (-1,4)

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What is 41/19 to the nearest tenth
olga2289 [7]

Answer:

2.2

Step-by-step explanation:

41/9 is 2.15789473684

since you need it to the nearest tenth, just get rid of the other numbers past the five, you will then have 2.15

since you are looking for the nearest tenth, you need to look at the 2nd number after the decimal place to determine whether it rounds up or down. ( a helpful rule is 5 or above, give it a shove. 4 or below, leave it alone. because the 2nd digit is 5 you need to give the 1 a shove and turn it into a 2. Since you gave the 5 a shove, you need to get rid of that 2nd digit in your answer.

FINAL ANSWER: 2.2

6 0
3 years ago
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KiRa [710]

Answer:

a  c e

Step-by-step explanation:

Brainliest Please?

5 0
3 years ago
A rectangular garden has a length that is 3 feet longer than its width. Let w represent the width of the garden in feet. The ent
Margarita [4]

Answer:

Step-by-step explanation:

From the question, we're told that the length of the garden is 3 feet longer than its width. Mathematically, we would have

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Again we're told that this same garden has a walkway of about 2 foot wide. Mathematically we would have that as

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8 0
3 years ago
Plzzzz
Lana71 [14]

Answer:

y = -1

Step-by-step explanation:

there is no graph

but only this answer passes the (3,1)

Please add picture next time

<3

<em><u>Red</u></em>

8 0
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liubo4ka [24]

Answer:

It doesn't make sense

Step-by-step explanation:

Given

Statement: .... at a speed of 35 miles .....

Required

Does it make sense?

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However, the given statement mention the unit of speed to be miles which is incorrect.

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<em />

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