need to know answer

need to know answer

How much water must be evaporated from 30 gallons of a 7% salt solution to make a 12% salt solution.

Really need help figuring out what to do.

Solve the following: a) 25 ≤ x2 b) (2x-3)/(x+1) ≥ 1

I'm a bit confused about these types of questions. I have quite a few of them but if I can get the gist of how to do one maybe I can do the rest on my own. thanks!

had dimes and quarters that equaled to $5.25 when you don't know how many coins you have--or must you have the amount of coin i would like a step by step equation...

the diagonal length of a rectangle is sqrt(46), and it's area is 9. Find it's perimeter

please I need help with this question. I need an explanation. 1- In a cribbage game with 2 people, each player is dealt 6 cards to start a round. How many 6-card hands are possible? would...

Tom has 21 coins. All are either quarters or dimes. The value of the coins is $2.55. How many quarters and dimes does he have?

A textbook store sold a combined total of 455 math and physics textbooks in a week. The number of physics textbooks sold was 85 less than the number of math textbooks sold. How many...

The lowest score that a student can earn and be admitted to the university is: Please help me my Stats teacher is very unclear and is rushing through...

I am struggling with this homework for a stats course. The teacher is very unclear and I cannot afford to fail. Any help would be appreciated it

Math🤔🤔 As a part of an exercise regimen ,you walk 8 miles on an indoor track . Then you not twice your walking speed for another 8 miles if the total time spent walking and jogging is 3 hours...

During take off a model airplane is ascending at a constant rate. The elevation of the model airplane was 125 feet, 10 seconds after take off and 365 feet 50 seconds after take off. What was the change...

5x + 2y = -4 3x + 5y = -10 The system of equations above is graphed below. Find the solution to the system. https://app148.studyisland.com/pics/LM8212_Question6...

Alyssa is buying miniature cars. She wants to buy 17 cars total for a big race she and her friends are having. Silver cars are $5 dollars each. Red cars are $7 dollars each. If she spends $111, how...

Alyssa is buying miniature cars she wants to buy 17 cars total for a big race she and her friends are having. Silver cars are $5 each. Red cars are $7 dollars each. If she spends $111, how much red...

The solutions are in the question. I need the actual equation of these answers please. Thanks for your help!

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Mike bought 4 feet of florist wire. How many inches of the wire does he have?

Find dw/dx for w=(3x5+2x4-6x2)/x2 I have done this derivative a couple different times and I can't figure out what is right or wrong because it seems like I am using all the rules right and...

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