What is the value of x? 21, 21, 36degrees

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?