Book Maths Puzzle Algebra

after stacy sees a lightning flash, its takes 8.34 seconds for her to hear the thunder. knowing that sound travels at 1129 feet per second, which of the following would be the best estimate of the distance in feet between her location and the storm?

Read Solution (Total 1)

no options are given here.
But distance = speed*time= 1129*8.34= 9415.86 ft.
10 years agoHelpfull: Yes(0) No(0)

Book Other Question

Question: how I can solve this equation.
x + y^(.5) = 7
y + x^(.5) = 11
I know the answer of these equations but don,t know how to solve?
meance in first equation just y plus x to the power .5 and in second equation swap x and y.
answer is x = 4 ...... and y = 9
but i want to know the method for solving this equation :-) I have been out of school for 20 years and trying to help my daughter with her homework, and I need help.

The problem is: I have $850 to replace a patio. I'm making a square concrete patio with a brick border that is 8 inches wide around the outer edge of the patio and the total length of a side is 2X inches. Draw a diagram and write a polynomial for the area of the floor of the patio not including the brick. Assume that X is equal to 10.''.