8x-12=36
Let's solve your equation step-by-step.
<span><span><span>8x</span>−12</span>=36
</span>Step 1: Add 12 to both sides.
<span><span><span><span>8x</span>−12</span>+12</span>=<span>36+12
</span></span><span><span>8x</span>=48
</span>Step 2: Divide both sides by 8.
<span><span><span>8x/</span>8</span>=<span>48/8
</span></span><span>x=6
</span>Answer: x=6
Multiply 12 and 3 and you will get four. four is like 1 over 4: 1/4
N = nickels and q = quarters
0.05n + 0.25q = 1.90
n = 2q + 3
0.05(2q + 3) + 0.25q = 1.90
0.10q + 0.15 + 0.25q = 1.90
0.10q + 0.25q = 1.90 - 0.15
0.35q = 1.75
q = 1.75/0.35
q = 5 ......there are 5 quarters
n = 2q + 3
n = 2(5) + 3
n = 10 + 3
n = 13 <=== there are 13 nickels
First you need to find the common denominator. both 6 and 7 go in to 42 evenly
multiply 5/6 by 7 to get 35/42
multiply 2/7 by 6 to get 12/42
subtract 12 from 35 to get 23
23/42
10. acute angles: 0
Right angles: 4
Obtuse angles: 0
Perpendicular lines: 0
Parallel lines: 2
11. Acute angles: 2
Right angles: 0
Obtuse angles: 1
Perpendicular lines: 0
Parallel lines: 0
12. H
