Assume that you sold x baseball cards. This means that you sold 4x movie posters. So if he made $840, then he got 8x dollars on the baseball cards and 4x*12=48x dollars on movie posters. Adding 8x and 48x should be 840. So 56x=480. This means that x=15. So if Brian made 48x dollars on movie posters, it's really 48*15=720. Therefore, Brian made $720 on the movie posters.
Answer:
Symmetry
Step-by-step explanation:
<span>It is important to know that the sum of the three angles inside a triangle add up to 180 degrees. So then we get the following by adding up all three provided angle measures:
3x + (2x + 20) + (4x - 20) = 180
Some algebraic manipulation follows:
3x + 2x + 20 + 4x - 20 = 180
9x = 180
x = 180/9 = 20
The value of x is 20 degrees.</span>
Answer:
She would save $10
Step-by-step explanation:
What would she pay for a year:
5×12=60
New router:
$50
What she saves:
$60-$50=$10
The answer is .8 because 8/10 is .8
