if 7 pizzas are sufficient for 20 people then how many are for 70

fifteen more than than four times a numbers equal to the difference between 21 and twice the number.

How many liters of a 70% acid solution must be mixed with a 25% acid solution to get 360 L of a 60% acid solution?

4.The Director of the sports program at a private university randomly selected 250 students and collected the[..]

3.The probability that a sophomore student studies philosophy course is 0.21. The probability of taking a sociology[..]

2.A company manufactures car batteries at three plants. Plant A produces 850 batteries a day, Plant B produces 630[..]

1.A coin is weighted so that the probability of heads is ¼. In a game of chance, a coin is tossed five times in[..]

a toy dump truck has a scale of 1:25 of an actual dump truck. the toy dump truck will 216cm squared of sand how[..]

The deck around a swimming pool has the same width all the way around. The perimeter of the pool is 50m. The outside[..]

An arch in a memorial park, having a parabolic shape, has a height of 25 feet and a base width of 30 feet. Find an[..]