Which systems of equations have no solution? x + 4y = 23
-3x = 12y + 1
2x + y = 17
-4x = 2y - 34
2x + 4y = 22
-X = 2y - 11
3y = 10 - x
2x + y = 7
2x + y = 15
x = 15 - 2y
y = 13 - 2x
4x - y = -1

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

How do i multiply two digit numbers

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?