Answer:
40x- 24y
Step-by-step explanation:
Answer: 48 books
Step-by-step explanation: Start by converting 60% to a decimal/fraction (60/100). From there, you can multiply it by the total (80) to get the answer.
The last one will give the incorrect slope
Answer:
The other angle is 190-7x.
Step-by-step explanation:
Angles in a triangle add up to 180 degrees.
Let A be the third angle.
A + (3x-20) + (4x+10) = 180
A = 180 - (3x - 20) - (4x + 10) = 190 - 7x
8a^2 + 3a^2
11a^2
since both have a^2 you only have to add the coefficients