Answer: y = 6; x = 12
Step-by-step explanation:
3x - 30 = y
Change this into an equation where x and y are in the same side.
3x - 30 = y
Subtract y from both sides
3x - y - 30 = 0
Add 30 to both sides
3x - y = 30
7y - 6 = 3x
Do the same thing I did to the first equation
7y - 6 = 3x
Subtract 3x from both sides
-3x + 7y - 6 = 0
Add 6 to both sides
-3x + 7y = 6
We can now use the system of elimination to find x and y.
3x - y = 30
-3x + 7y = 6
After adding both equations, you get:
6y = 36
Divide 6 from both sides
y = 6
Since we now know y, we can solve for x.
3x - 30 = y
Substitute y for 6
3x - 30 = 6
Add 30 to both sides
3x = 36
Divide both sides by 3
x = 12
Hope this helped!
Answer:
82.5in²
Step-by-step explanation:
11×15=165
165÷2=82.5
Answer:
answer in explanation
Step-by-step explanation:
-1.4
-1.38
-0.5
0.76
1.9
Answer:
$
8.50
×
0.065
=
$
0.5525
cents rounded to
$
0.55
or
55
cents.
Explanation:
The sales tax rate is usually a percentage (assumed here).
6.5
percent equals
0.065
(percent means "per 100" so is divided by
100
).
Step-by-step explanation: