Hannah spends hours looking for sand dollars at the beach for every 2 sand dollar she finds she finds 7 clamshells if she found 21 clam shells last month how many sand dollars did you find?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

What percent of 18 is 24? and plz explain thx.

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.