In this question, we're solving the expressions.
Problem 1:
For problem 1, f(x) + g(x) means that we're combining both of the equations together by adding.
Solve:
3x + 2 + x - 3
Combine like terms:
4x + 2 - 3
Answer to problem 1: 4x - 1
Problem 2:
In this problem, you're getting both of the expressions and combining them; however, you would need to plug in -1 to the x variable in both of the expressions.
Your problem should look like this:
3(-1) + 2 - 1 - 3
Solve:
3(-1) + 2 - 1 - 3
-3 + 2 - 1 - 3
-1 - 1 - 3
-2 - 3
-5
Answer to problem 2: -5
Answer:
27.30
Step-by-step explanation:
"Per" means "divided by", so "dollars per square mile" means
... dollars ÷ square miles
... 5e6 ÷ 6.6e4
Only the last choice, D), has these keystrokes.
Answer:
Shelf A = $6 ;Shelf y = $4
Step-by-step explanation:
Let :
x = cost of items from shelf A
y = cost of items from shelf B
3x + 2y = 26 - - - - (1)
2x + 5y = 32 - - - - (11)
Using elimination method :
Multiply (1) by 2 and (11) by 3
6x + 4y = 52 - - - (111)
6x + 15y = 96 - - - (1V)
Subtract (1V) from (111)
-11y = - 44
y = 44/ 11 ; y = 4
Put y = 4 in (1)
3x + 2(4) = 26
3x + 8 = 26
3x = 26 - 8
3x = 18
x = 18 / 3
x = 6