X+a=c solve for x what does x equal

Matlab given a sequence of numbers {1, 1, 2, 3, 5, 8, 13, ... } where each term is the sum of the previous two, find the 30th term of this sequence

What is the simplified form of 2n+3 (n+4) W

What is the property of 15x (7x9) = (15x7) x9

Ava's heart rate is 65 beats per minute. If this is her average heart rate, how many times will her heart beat in 10 years.

Edgardo has a drink cooler that holds 10 gallons of water. He is filling the cooler with a 1 quart container. How many times will he have to fill the quart container to fill the cooler?

If the reservoir is 190 metres above the intake, how many cubic metres of water will there be delivered during the night?

A bag of marbles contains only purple and yellow marbles. The bag has three times as many yellow marbles as purple. The bag contains 164 total marbles. Write an equation or system of equations to find out how many of each color is in the bag.

Heather and Joel are setting up a new budget. They have decided that the ratio of spending to saving needs to be 5:2. They have added up all of their bills for last month and see that they spent a total of $4,231. They also see that they put $2538.

Oliver is training for a marathon. In practice, he runs 15 kilometers in 72 minutes. What is the speed in kilometers per hour?

I have one more question I can figure out how to get the answer via the calculator but I'm not sure how I got there 43.6x2.94