Find the slope intercept form pls?

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Landon wrote that 3−2.6=4. which statement about his answer is true?