Answer:
4x+1
Step-by-step explanation:
sum= addition
one=1
and= plus
product of four and a number: when we say a number we usually use the variable x. 4(x)= 4x
put together: 4x+1 (no equal sign needed)
In line one she forgot to multiply 4 on the left side by -1
320=30+15s
290=15s
S=19.33
S=19
19 student tickets.
Answer:
Like terms:

1.25x²
-8x²
Step-by-step explanation:
Like terms are terms that have the same variable to the same exponent. In this case, the only like terms are those with the variable 'x' to the exponent of '2', or x². This would include the terms:

1.25x²
-8x²
The term 5yx², also includes x², however, it also includes the variable 'y' which makes it 'unlike' the other terms.
Answer:
42°
Step-by-step explanation:
angle 3 + angle 4 = 180° because together they make a straight line. So your equation should be 23x + 7x = 180. Add the like terms and you get 30x=180. Divide by 30 on both sides to get x. now you know that x=6. angle 4 = 7x. so you would multiply 7*6 to get 42. Thus angle 4= 42°
30 = 6 + 2x
x = 12 fish caught last year