you can type 105 words in 2 minutes. your friend can type 210 words in 4 minuets. are these rates proportional ??

What is the smallest integer n such that n\sqrt{2} is greater than 20

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.