Answer:
9
Step-by-step explanation:
Substitute w = 3 into the expression
6w - 9
= 6(3) - 9
= 18 - 9
= 9
Answer:
$162
Step-by-step explanation:
Discount = percentage discount ÷ 100 × original cost
Discount = 
× $405 = $162
Distribute and combine like-terms!
-4x + 12x - 2x - 2
6x - 2
You are given two equations, solve for one variable in one of the equations. Say you solved for x in the second equation. Then, plug in that value of x in the x of the first equation. Solve this (first) equation for y (as it should become apparent) and you'll get a number value. Plug in this numerical value of y into the y of the second equation. Solve for x in the second equation. And there you have it: (x, y)
