Use the substitution method to solve the system of equations. x + y = 20 30x + 25y = 550

Find the x-intercept and y-intercept of the line. 3x + 5y = −15

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

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together