1) -5g-6 for g=-2
a) 4
b)16
c)10
d)-13
2) write an algebraic expression for the sum of 3 coins and c coins
a) c+3
b)c/3
c)3c
d)c-3
3) x-2=16
a)14
b)18
c)21
d)12
4) z/-12=-5
a)7
b)-60
c)-17
d)60
5) estimate the solution of the equation x-8.1=5.3 to the nearest whole number
a) about 13
b)about 14
c)about 4
d) about 3
6) 14=t-44
a)-30
b)-58
c)30
d)58
7) -30=j+50
a)80
b)20
c) -1500
d)-80
8)2.8x=-9.24
a)12.04
b)-0.3030
c)-3.3
d)-12.04
9)5.8=z/2.2
a)127.6
b)0.37
c)3.7
d)12.76

1) A

2) A

3) B

4) D

5)A

6) D

7)  A

8) C

9) D

Step-by-step explanation:

1) -5 (-2) -6= 4

2) 3 coins plus c coins = 3 + c

3) x-2 =16, x = 18

4) =-5. Clearing, z =  60

5) x =13,4

6) 14=t-4. Clearing t = 58

7) -30=j+50, clearing j=80

8) 2.8x=-9.24, clearing x=-3-3

9) 5.8= . Clearing z=12.76

step- i d k and i d c : )

you: : 0

bye

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1