Which ratios form a proportion?

A. 20/25, 14/21

B. 10/23, 18/7

C. 5/45, 4/36

D. 5/4, 4/5

4 (x + 1) - 7x = - 3 (x - 1) + 1

Of 450 lunches were sold at school on thursday 40% were hamburgers and the rest were pizza how many more pizza lunches were sold than hamburgers

Which two events are independent? 1.) A and X 2.) A and Y 3.) B and X 4.) B and Y

You have 10$ and you buy something and your change was 6.92 how much did you spend.

Suppose you have data that shows that 12% of athletes test positive for steroids. You also know that 11% of athletes test positive for steroids and actually use steroids.

Angelo runs 7 miles per week and increases his distance by 1 mile each week. Marc runs 4 miles per week and increases his distance by 2 miles each week. In how many weeks will Angelo and Marc be running the same distance? What will that distance be?

3 2. DOG FOOD A bag contains 42 cups of dog food. Your dog eats 2 cups of dog food each day. How many days does the bag of dog food last?

Jane drove 260 miles using 12 gallons of gas. At this rate, how many gallons of gas would she need to drive 286 miles

Which subtraction expression has the difference 1 + 4i? (-2 + 6i) - (1 - 2i) (-2 + 6i) - (-1 - 2i) (3 + 5i) - (2 - i) (3 + 5i) - (2 + i)

Choose the number pair that has digits of 4 that differ in place by a factor of 1000. 4 A. 49,823 and 81,540 B. 83,419 and 46,859 C. 54,890 and 81,745 D. 47,063 and 54,722 4. NBT. 1