Please help If the sin of angle X is 4/5 and the triangle was dilated to be two times as big as the original what would be the value of the sine of X for the dilated triangle?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?