A boat whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:

A counter example for any number that is divisible by 4 is also divisible by 8

Analyze the ratio below and complete the instructions that follow. $30:$6 Simplify the ratio. A. 1:5 B. 3:15 C. 5:1 D. 15:3

A fair number cube is rolled. What are the odds in favor of rolling a 1?

The last time mr. Hall's truck tank was filled the odometer reading was 7998 miles the next time she had to fill up her vehicle the odometer reading was 8308 it's a single gallons to fill the tank what was Ms.

Ms. Sung budgets a maximum of $320 per month for groceries. She grocery shops 4 times a month. Which inequality can be used to find the possible values of x, the amount she can spend at the grocery store during each shopping trip?

Solve for x: a (x+b) - c=d

3x - 7y = 5 9y = 5x + 5

Elyse has earned scores of 87, 91, 90, and 85 on her first four math tests. If she wants to have a mean of 90, what must she earn on the fifth test?

How many balls each of radius 2cm can be made from a solid sphere of lead of radius 8cm

Delia spent 45 minutes working on her book report she finished at 6:10 p. m. at what time did delia start working on her paper