Tutors Answer Your Questions about Linear-systems (FREE)
Question 412922: Kindly answer these problems please because i am still quite confused in answering these problems and please apply system of linear equations.
1) Working together, Tom and Jerry cleaned the swimming pool in 6 hrs. If both of them worked together for the 1st 3 hrs., and Jerry stopped for an errand it would require Tom 4 hrs. to finish cleaning the pool. How long would it take Jerry to clean the pool alone? How long would it take Tom?
Thank you in advance! Hoping for your immediate reply.
Click here to see answer by ankor@dixie-net.com(15660)   |
Question 413925: suppose y varies directly as the square of x,
a. Find the constant of proportionality if y=4 when x=3. What is x when yis 16?
b. if the constant of variation is 5/8, what is y when x=6? what i x when y= 90?
c. find the constant of variation and the value of y when x=5 if y=2 when x=2
Click here to see answer by ewatrrr(10682)  |
Question 413927: The surface area of a sphere varies directly as the square of a radius.
a. if the surface area is 16pi when r is 2, find the constant of variation.
b. Find the surface area when the radius is 5.
c. Find the radius when the surface area is 48 pi.
Click here to see answer by ewatrrr(10682) |
Question 414115: carl bought 19 apples of 2 different varieties to make a pie. The total cost of the apples was $5.10. Granny Smith apples cost $0.25 each and Gala apples cost $0.30 each. How many of each type of apple did Carl buy?
Click here to see answer by ewatrrr(10682) |
Question 414219: Write an equation in standard form of the line passing through (2,-5) and (-4,7) Thanks. Please answer ASAP for I have a test on monday.
I have tried doing the first y minus second y over first x minus second x to find the slope. I got -2. Then I plugged it in to the slope intercept form. Y =mx +b I plugged in one ordered pair and got the y intercept is equal to -1. I got -2x + y = -1 but the textbook said that the answer was 2x +y =-1
Click here to see answer by mananth(12270)  |
Question 414234: Sarah purchased two picture frames. The perimeter of the larger frame is 240cm, and the perimeter of the smaller frame is 140cm. The height of the smaller frame is the same as the width of the larger frame, and the width of the smaller frame is 10cm less than the height of the smaller frame. Find the dimensions of the larger frame.
Click here to see answer by ankor@dixie-net.com(15660) |
Question 414848: Fred weighs 187 pounds but is on a diet that makes him lose 1.7 pounds per week. Barney weighs only 93 pounds but is on a diet that makes him gain 0.9 pounds per week. What is the number of weeks it takes for Fred and Barney to weigh exactly the same amount? How many weeks does it take for their total weight to equal 252 pounds?
Click here to see answer by stanbon(57387) |
Question 414942: The perimeter of a triangle is 5 ft. The longest side of the triangle measures 20 in. more than the shortest side. The middle side is 3 times the measure of the shortest side. Find the lengths of the three sides in inches.
so far i have this but I'm not sure if their right
P=5 ft.?
L=S+20?
M=3s?
Click here to see answer by ankor@dixie-net.com(15660) |
Question 415423: I need help with figuring out how to work these types of problems. Step by step. For example, here are two examples of problems I need help understanding how to work.
Solve - -2(-1-3y)=7y
solve 7(6=w)=6(2+w)
I know the goal is to get the variable by itself but I am confused. Please advise. Thanks!
Click here to see answer by stanbon(57387) |
Question 415485: The formula h=vt-16^2 models a football being kicked into the air where h is the height of the ball in feet above the point at which it is kicked and t is the time in seconds. If the initial velocity, v of the kick is 48 feet per second, how long will the ball remain in the air before returning to the ground?
Sketch graph and lable the zero points with x & y coordinates.
Click here to see answer by solver91311(16897)  |
Question 417614: Please answer this problem using systems of linear equations in three variables.
The sum of the length, width and the height of a rectangular box is 17 cm. Twice the width exceeds the height by by 1 and the sum of the length and the width is shorter than the height by 1 cm. Find the dimensions of the box.
Click here to see answer by htmentor(789)  |
Question 417859: I have a word problem that I am not sure how to put into an algebraic equation(s):
Peter can buy a high-efficiency furnace for $2250 that costs $412 per year to operate. He may also buy a standard furnace for $1710 that costs $466 per year to operate. Find how long it will take for the two furnaces to have the same cost. If Peter intends to live in his house for 7 years which furnace should he buy? What if he wants to live in his house for 20 years?
My instructor did not cover any word problems even close to this one, so if anyone could help me with this I would appreciate it. It is due Tuesday.
Click here to see answer by ankor@dixie-net.com(15660) |
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