Answer:
-12m-6n
Step-by-step explanation:
Let's break this down systematically
Start:
8m + 2n - 4(5m - 2n)
Use the distributive property
8m + 2n - <u>4(5m - 2n)</u>
8m + 2n - 20m - 8n
Match like terms <em>m </em>and <em>n</em>
8m - 20m = -12m
2n - 8n = -6n
<u>-12m-6n</u>
There is a baseball game. It is 2$ for every person, which is x, that wants to watch the game. After the game, you pay the umpires a total of 125$. After the end of the day you have made 400 dollars. How many people came to the game. So find x.
Answer:
{(-34/7, -16/7)}
Step-by-step explanation:
Rearrange values, multiply to solve for x.
(5) 2y = 3x + 10
(-2) 5y = 4x + 8
Solve for x.
10y = 15x + 50 ↓
-10y = -8x -16
Combine and evaluate.
0 = 7x + 34
Subtract 34 from both sides.
7x = -34
Divide both sides by 7.
x = 
Plugin x value into either equation to solve for y.
2y = (3 ×
) + 10
2y =
+ 10
2y = 
y = 
Answer:
x=76°
Step-by-step explanation:
BD║XY 76°=x