I think of a number and multiply it by 4. I then add 8 and I'm left with an answer of 30. What number did I think of? Form and solve an equation to find the number.

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?