Algebra questions please!?

Question

Hi, I have a few Algebra questions I have to do for a assignment..I did not study this properly because I broke my leg and was away for a while (bummer)..please if you can also explain it to me I would greatly appreciate it.

Use elimination to solve the system of equations.
-x + 2y = 18
x + 8y = -38
A.)(-22, -2)
B.)(2, 2)
C.)(14, 2)
D.)(-2, 14)

Question 2
Factor x^2 + 13x + 42.
A.)(x - 7)(x + 6)
B.)(x - 6)(x - 7)
C.)(x + 6)(x + 7)
D.)(x + 6)(x + 6)

Question 3
Solve x^2 + 5x - 14 = 0.
A.)x = 2, -7
B.)x = 7, -2
C.)x = 0, 7
D.)x = 2

Question 4
Solve the following: (q + 2)^2 = 25.
A.)q =3, -7
B.)q = 3
C.)q = -7
D.)q = 0

Question 5
Solve the following: y2 + 6y + 9 = 49.
A.)y = -3
B.)y = 4, -10
C.)y = 2
D.)y = 3

Question 6
Which point is a solution to the system of inequalities: y < 4x - 5 and 3x < 2y - 5?
A.)(2, 5)
B.)(-6, -30)
C.)(0, -10)
D.)(10, 20)

Thank You!!!

Answer 1

thumbs down to everyone who just gave you the answers....how are you supposed to learn anything if other people just do it for you. if had a broken leg, you should have had plenty of downtime to use for studying. in all seriousness, for your sake, don't just copy people's answers, you won't get anywhere...sure you may get these questions right, but then what are you going to do on your tests? you won't have these people around to do it for you. my advice: sit down with a pencil, paper, and maybe some good music, and start practicing, and you will find that these questions are not very difficult at all. trust me.

Answer 2

Problem 1

- x + 2y = 18- - - - - -Equation 1
x + 8y = - 32- - - - - -Equation 2
- - - - - - - - -
10y = - 20

10y/10 =- 20/10

y = - 20/10

y = - 2

The answer is y = - 2

Insert the y value into equation 2

- - - - - - - - - - - - - - - - - - - - - -

x + 8y = - 38

x + 8(-2) = - 38

x + (- 16) = - 38

x - 16 = - 38

x - 16 + 16 = - 38 + 16

x = - 22

The answer is x = - 22

Insert the x value into equation 2

- - - - - - - - - - - - - - - - - - - - - -

Check for equation 2

x + 8 y = - 38

- 22 + 8(-2) = - 38

- 22 + (- 16) = - 38

- 22 - 16 = - 38

- 38 = - 38

- - - - - - - - -\

Check for equation 1

- x + 2y = 18

- (- 22) + 2(- 2) = 18

22 + (- 4 = 18

22 - 4 = 18

18 = 18

- - - - - - - - - - -

Problem 2

x² + 13x + 42

x² + 7x + 6x + 42

x(x + 7) + 6(x + 7)

x + 6)(x + 7)

- - - - - - - - -

Problem 3

x² + 5x - 14

x² + 7x - 2x - 14

x(x + 7) - 2(x + 7)

(x - 2)(x + 7)

- - - - - - - -

Problem 4

(q + 2)² = 25

√(q + 2)² = ± √25

q + 2 = ± 5

q + 2 - 2 = - 2 ± 5

q = - 2 ± 5

- - - - - - - - -

Problem 5

y² + 6y + 9 = 49

(y + 3)² = 49

√(y + 3)² = ± √49

y + 3 = ± 7

y + 3 - 3 = - 3 ± 7

y = - 3 ± 7

- - - - - - - - - - -s-

Answer 3

Use elimination to solve the system of equations.
-x + 2y = 18
x + 8y = -38
------------------
10y=-20
y=-2

x+8(-2)=-38
x-16=-38
x = -22

Question 2
Factor x^2 + 13x + 42.
(x+7)(x+6)
Need to multiply to 42 and add to 13

Question 3
Solve x^2 + 5x - 14 = 0.
(x-2)(x+7)=0
x-2=0 and x+7 = 0
x=2 x = -7


Question 4
Solve the following: (q + 2)^2 = 25.
q^2+4q+4=25
q^2+4q-21=0
(q+7)(q-3)
q=-7, q=3

Question 5
Solve the following: y2 + 6y + 9 = 49.
y^2+6y-40=0
(y+10)(y-4)=0
y=-10 y =4
Question 6
Which point is a solution to the system of inequalities: y < 4x - 5 and 3x < 2y - 5?

D.)(10, 20)

Answer 4

4.
(q+2)^2=25
q+2 = plus/minus 5
q= -7, 3

5.
y^2+6y-40 = 0
(y-4)(y+10)=0
y = 4, -10

Answer 5

My first answer replaced into seventeenth floor... besides the undeniable fact that, what happens from this factor; The elevator is going down back, and you get off. Acorrding to the trend, on which floor are you presently? The trend starts off another time...??? 17-4+8-3+9= twenty seventh floor.

Answer 6

QUESTION 1-
-x + 2y = 18
x + 8y = -38
use addition.
10y = -20 .... divide through by 10 now
y = -2 , then when you solve back for x you should get -22
ANSWER A
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QUESTION 2-
x^2 + 13x + 42
(x+7)(x+6)
ANSWER C
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QUESTION 3-
x^2 + 5x - 14 = 0
(x+7)(x-2) = 0
x+7 = 0
x = -7

x-2 = 0
x = 2
ANSWER A
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QUESTION 4-
(q+2)(q+2) = 25
q^2 + 4q + 4 = 25
q^2+ 4q - 21 = 0
(q+7)(q-3)=0
q+7 = 0
q=-7

q-3=0
q=3
ANSWER A
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QUESTION 5-

y2 + 6y + 9 = 49
y2 + 6y - 40 = 0
(y+10)(y-4)=0
.....
ANSWER B
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QUESTION 6-

i couldnt get this one for some reason? sorry!

Answer 7

(-17)-(-22)=

Answer 8

1.)A
2.)C
3.)D
4.)B
5.)Sorry, the choices won't fit
6.)D

Answer 9

1A
2C
3A
4A
5B
6D