Iwill give brainliest
evaluate 3 + (-h) + (-4) where h = -7

3+7-4=6

Step-by-step explanation:

replace the h with -7.

3+ [-(-7)]+(-4)

simplify. two negatives make a positive, causing the [-(-7)] to simply become 7.

the +(-4) simplifies to -4.

so...

3+7-4

from here its really really easy, just simple add and subtract.

3+7=10

10-4=6

If it helped, id really appreciate brainliest :)

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18