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Delvig [45]
2 years ago
6

What is the solution to the system of linear equations? y = 4x + 7 { y = 8x + 19

Mathematics
2 answers:
bekas [8.4K]2 years ago
8 0

Answer:

(- 3, - 5 )

Step-by-step explanation:

y = 4x + 7 → (1)

y = 8x + 19 → (2)

substitute y = 8x + 19 into (1)

8x + 19 = 4x + 7 ( subtract 4x from both sides )

4x + 19 = 7 ( subtract 19 from both sides )

4x = - 12 ( divide both sides by 4 )

x = - 3

substitute x = - 3 into either of the 2 equations and solve for y

substituting into (1)

y = 4(- 3) + 7 = - 12 + 7 = - 5

solution is (- 3, - 5 )

vova2212 [387]2 years ago
6 0

Answer:

(- 3, - 5 )

Step-by-step explanation:

It wont always be easy, but always try to do what ' s right!    

In a world of worriers, be the warrior!         

When nothing goes right, go left.

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What is the slope of (-4,6) and (2,-5)
Dominik [7]

Answer:

-11/6

Step-by-step explanation:

Slope can be found with this equation:

(y₁ - y₂) / (x₁ - x₂)

What this essentially tells us to do is to put one set of the x and y coordinates into x₁ and y₁, respectfully. Then, put the other set of x and y points as x₂ and y₂.

With this scenerio, we can substitute the given points into the formula.

(6 - (-5)) / (-4 - 2) =

(6 + 5 ) / (-6) =

11 / (-6) =

-11/6

The slope is  - 11/6

4 0
3 years ago
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A store sells cans of tomatoes priced as shown.
lesantik [10]

Answer:

The answer is C. 18 ounces

Step-by-step explanation:

You just divide the ounces by the cost and which ever you get lower is the answer

3 0
3 years ago
Brainliest!!!
Cloud [144]

Answer:

3rd option

Step-by-step explanation:

We have two kind of necks and three different colours so the andswer would be 3rd option

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7 0
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Jimmy collects nickels and dimes. Right now, he has a total of 40 coins in his piggy bank. If there are seven times as many dime
Colt1911 [192]
Number of nickels plus number of dimes equals total number of coins
so
n + d = 40

then they tell us that "there are seven times as many dimes as there are nickels"
this translates to
d = 7n

we then plug that into our first equation
and get
n + 7n = 40

then we solve for n
add like terms
8n = 40

then divide both sides by 8
n = 40/8 = 5

therefore Jimmy has 5 nickels
4 0
3 years ago
PLEASE HELP!!!
diamong [38]
DE. AB, is going up BC, isn't decreasing or increasing. CD, isn't decreasing or increasing. Therefore your answer is DE.
8 0
3 years ago
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