Stefan spent half of his weekly allowance playing mini-golf. to earn more money his parents let him wash the car for $7. what is his weekly allowance of he ended with $13?

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

Which statement justifies why angle ebc measures 90?