Apile of sand has a weight of 90kg the sand is put ina small bag a median bag and a large bag in a ratio 2: 3: 7 work out the weight. of the sand in each bag

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.

What does independent variable and dependent variable mean in math?