Answer: x = 17
Step-by-step explanation:
2+x = 2x-15
subtract x on both sides
2 = x -15
add 15 to both sides
17 = x
------------------
17+2 = 2(17)-15
19 = 34 -15
19 = 19
Goal: Try to get the variable by itself!
5n+4=-26
-4= -4
5n=-30
n=-6
1. Graph: a) positive:x>1
b)negative: x<1
c) increasing : none
d ) decreasing: x ∈ R\ { 1 }
2. a) positive: x < -2
b) negative: x > -2
c) increasing: x ∈ R\ { -2 }
d ) decreasing: none.
3. a) positive: x ∈ R\{ 0 }
b ) negative: none
c ) increasing: x< 0
d ) decreasing: x> 0
Draw your own diagram: in the attachment.
Answer:
Step-by-step explanation:
Number 13:
a+b=3+4
= 7
Number 14:
c-a= 12-3
= 9
Number 15:
a+b+c= 3+4+12
= 19
