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Mekhanik [1.2K]
2 years ago
9

Solve the system by substitution. 2x=y-10 2x+7=2y The solution is ( , ).

Mathematics
1 answer:
Ugo [173]2 years ago
7 0

Answer:

Step-by-step explanation:

2x=y-10

2x+7=2y

====

2x=y-10

x = (y-10)/2

Use this in the 2nd equation:

2x+7=2y

2((y-10)/2)+7=2y

y - 10 + 7 = 2y

-y -3 = 0

-y = 3

y = -3

Use this in either equation:

2x=y-10

2x=(-3)-10

x = -(13/2) or - 6.5

(-6.5, -3)

See attached graph.

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Slope of (-2,-1) and (5,-1) in fraction form
dangina [55]

Slope is 0

Step-by-step explanation:

  • Step 1: Find slope using the formula for slope, m = (y2 - y1)/(x2 - x1) Here, x1 = -2, y1 = -1, x2 = 5 and y2 = -1

⇒ m = (-1 - -1)/(5 - -2)

        = 0/7 = 0

7 0
3 years ago
the local bakery uses 1.75 cups of flour in each batch of cookies. the bakery usee 5.25 cups of flour this morning. How many bat
Travka [436]

Answer:

Using 5.25 cups of flour would make 3 batches of cookies. He made 180 cookies.

Step-by-step explanation:

To see how many batches you make all you do is take the 5.25 and divide it by 1.75 because thats how much it takes to make 1. When you divide it you get 3. If there are 5 dozen in each batch thats 60 cookies because 1 dozen is 12. Then,since he made 3 batches you multiply the 60 by 3 and you get 180.

Hope this helps!

4 0
3 years ago
Simplify the expression:-5-(-26)​
cluponka [151]

Answer:

21

Step-by-step explanation:

-(-26) would be positive 26 because one negative multiplied by another negative equals a positive. We are left with -5+26 which would equal 21.

4 0
3 years ago
Read 2 more answers
In this question, all lengths are in centimetres.
JulsSmile [24]

Answer:

Step-by-step explanation:

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(3x-4)/(2x+12)=1/2

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AC/BC =3x-4/7x-2=22/33=2/3

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You would get 4/5 still trying to work out the last mark

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3 years ago
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finlep [7]

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2 years ago
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