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Fiesta28 [93]
2 years ago
7

PLSS HELP ME WITH THIS!! 25 POINTS!

Mathematics
1 answer:
kap26 [50]2 years ago
5 0
X must be greater than or equal to -4, not sure how you’d plot it.
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7x + 2y = -1<br> 3x – 4y = 19
jeka94

Answer:  Y = - 4 & x = 1

Step-by-step explanation:

Systems of linear equations: We will solve this using substitution but you can use 2 more ways.

7x + 2y = -1

2x - 4y = 19

Leave X  alone first: -------------------

10x - 2y = 18

10x/10 = 18 + 2y/10

x = 9/5 + y/5

Solve for y:

7(9/5 + y/5) + 2y = -1

63/5 + 7y/5 + 2y - 1

63/5 + 7y/5 = 10y/5 = -1

63/5 + 17y/5 = -1 (-5/5)

17y/5 = -68/5 (cancel the 5)

y = -68/17

y = - 4 (Your Answer)

7x + 2(- 4) = -1

7x + (-8) = -1

7x = 7

x =   1

CHECK=

7(1) + 2(-4) = -1

7+ (-8) = -1.

-1=-1

7 0
3 years ago
Read 2 more answers
Find the product. 2 (-5)
expeople1 [14]

Answer:

-10

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Evaluate the radical.<br> (Look at the photo)<br> Enter your answer in the box.
faltersainse [42]

Answer:

3

Step-by-step explanation:

This is a cube root so think what times what times what is 27?

3 x 3 x 3 = 27 so the answer is 3

Same problem explained

https://www.mathsisfun.com/numbers/cube-root.html  < in detail.

Very helpful website check it out

(It's not a random download link or whatever, look at my profile- i dont do that, its completely safe and legit.)

3 0
3 years ago
How do you solve this step by step??
KonstantinChe [14]

Answer:

Step-by-step explanation: 6x+5x=3x+2x-54

                                               11x=5x-54

                                                +5x  +5x

                                                   16x=54

                                                     16    16

                                                       x=3.375

3 0
3 years ago
Solve the system of equations. -5x+6y=40;3y-8x=-46
Effectus [21]

Equation Form:

x

=

12

,

y

=

50

3

or

x

=

12

,

y

=

50

3

x

=

12

,

y

=

50

3

x

=

12

,

y

=

50

3

x

=

12

,

y

=

50

3

Step-by-step explanation: I have no idea why it looks like that

8 0
2 years ago
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