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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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adell [148]
The answer to the question

4 0
2 years ago
Write in standard form
Natalka [10]

Answer:

2.988*10^8

Step-by-step explanation:

to do standard form you have to  move the decimal to after the first number so in this case we would move the decimal 8 places from 298800000.0

to 2.98800000 and we can remove the zeros to make it 2.988

then you will plug the times ten and because we move the decimal over 8 it would be 10 to the power of 8 so your answer would be 2.988*10^8

hope this helps have a good day

<em>brainlest please? :)</em>

5 0
2 years ago
Read 2 more answers
27? i cant figure out her mistake can anyone help ?
expeople1 [14]
The mess up occurs in one of the first things she says. She first claims that 7^2 +25^2 = 24^2
Wait a minute... slow your roll there.
25 is the hypotenuse, or the longest side of the triangle AND opposite the right angle (but we aren't supposed to know that yet).
The Pythagorean Theorem holds that a^2 + b^2 = c^2, where a & b are the legs of the triangle & c is the hypotenuse. So, she got the formatting correctly, but she switched 24 & 25.
Hope this helps!
4 0
3 years ago
Read 2 more answers
For each equation how many solutions why?<br> Question e
Kay [80]

Answer:

one real solution

Step-by-step explanation:

it has only one solution since it is a linear graph and only intercepts the x axis once

4 0
2 years ago
Sams invested $2700 in an account with annually compounded interest. After 7 years, he had $3432 in the account. What was the in
OlgaM077 [116]

Answer:

3.5

Step-by-step explanation:

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2 years ago
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