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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 50986: I need the method for solving this more than the answer, but both would be appreciated:
Mark launched a model rocket using an engine which will generate a speed of 180 feet per second. The formula h = rt - 16t squared gives the height of an object projected upward at a rate of r feet per second after t seconds. After how many seconds will Mark's rocket reach a height of 464 feet? After how many seconds will it be at that height again? Thank you.
Click here to see answer by Earlsdon(4898)   |
Question 51153This question is from textbook
: write an expression for 8 minus the quanity 9 minus t
Please explain how to do this. I have until this year been in a special ed math class my skills have advanced but I don't understand this oneThis question is from textbook
Click here to see answer by checkley71(8405) |
Question 51242: Hi, my daughter is in 7th grade PreAlgebra and we do not have our book yet. She has been given her assignments as typed handouts. One particular problem has both of us STUMPED. The teacher's instructions were to use an equation to answer this problem. Thanks for your help.
3 bacteria are placed in a petri dish and then counted each hour. The first three bacteria counts were: 12, 39, 120. If this pattern continues, how many hours after the bacteria are placed in the dish will there be 3279 bacteria?
(A) after 6 hours (B) after 12 hours (C) after 8 hours (D) after 4 hours
Click here to see answer by Nate(3495) |
Question 51224: 1) What quanity of 75% acid solution must be mixed with a 30% solution to produced 1080mL of a 50% solution?
2) 2 cyclist, 48 miles apart, start riding toward each other @ the same time. One cycles 3 times as fast as the other . If they meet 2 hrs. later, what is the speed (in miles per hours) of the faster cyclist?
Click here to see answer by Nate(3495) |
Question 51290: Hello,,Tryig to help my son with his homework. Any help from You would be son appreciated. Thanks!!!Expressing relationship using variables>
#1
Input Output
12 -- 16
16 -- 19
20 -- 22
24 -- 25
26 -- 26.5
#2
Input Output
1-- 3
2-- 5
3-- 9
4-- 17
5-- 33
Thank you, again for any help. DANA
Determine the relationship and express them using variables
Click here to see answer by THANApHD(104)  |
Question 51339: Please help me with this one. I am in no way good at this but I am trying to keep from asking for help, thank!
Solve each of the following systems by substitution.
5x - 2y = -5
y - 5x = 3
Click here to see answer by chuy605(1) |
Question 51393: I am having problems solving this problem:
A right triangle is a triangle with one angle measuring 90°. In a right triangle, the sides are related by Pythagorean Theorem, where c is the hypotenuse (the side opposite the 90° angle). Find the hypotenuse when the other 2 sides’ measurements are 3 feet and 4 feet.
Thanks for your time!
Click here to see answer by stanbon(26259) |
Question 51392: I am having problems solving this problem:
Suppose you travel north for 35 kilometers then travel east 65 kilometers. How far are you from your starting point? North and east can be considered the directions of the y- and x-axis respectively.
Thanks for your time!
Click here to see answer by stanbon(26259) |
Question 51392: I am having problems solving this problem:
Suppose you travel north for 35 kilometers then travel east 65 kilometers. How far are you from your starting point? North and east can be considered the directions of the y- and x-axis respectively.
Thanks for your time!
Click here to see answer by rchill(405) |
Question 51628: An inheritance of 900,000 is to be divided among Scott, Alice, and Tricia in the following manner:
Alice receives 3/4 of what Scott gets while Tricia receives 1/2 of what Scott gets. How much does each receive?
Click here to see answer by checkley71(8405) |
Question 51628: An inheritance of 900,000 is to be divided among Scott, Alice, and Tricia in the following manner:
Alice receives 3/4 of what Scott gets while Tricia receives 1/2 of what Scott gets. How much does each receive?
Click here to see answer by rchill(405) |
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