Dan has some marbles

ellie has twice as many marbles as dan

frank has 15 marbles

dan, ellie and frank have a total of 63 marbles

A) how many marbles has does dan have.

B) write the ratio of dans marbles to ellie's marbles in its simplest form.

If ΔEFG ~ ΔLMN with a ratio of 2:1, which of the following is true? A) segment EF over segment LM equals segment FG over segment MN B) segment EF is congruent to segment LM C) segment EF over segment LM equals segment EG over segment LM D) segment

The temperature on the moon can vary from 243°F to - 261°F. By how many degrees can the temperature vary on the moon?

Ted says that 3/10 Ted says that 3/10 * 100 equals 300000 is he correct use the place value chart to explain your answer

2x + 3y = 6 -5x+2y = 4

Sara needs 3 cups of orange juice and 2 cups of pineapple for punch recipe. She only has a half cup measure. How many half cups of juice does she need? Explain your thinking here: write your answer here:

Which of the following smoothing constants would make an exponential smoothing forecast equivalent to a last-value forecast? Select one: a. 0. b. 0.01. c. 0.1. d. 0.5. e. 1.

What is the conjugate of 6 + 7i

Tina had $47.10 in her bank account on Monday. She withdrew $25 on Monday and also made a deposit of an amount d that she cannot remember. Tina had $97.43 in her account on Tuesday.

How can you add, subtract, and multiply with decimal

What does ( - 1.2) * (0.4) equal?