Solve the following system. If necessary, write your answers as improper fractions. If the system has no solution, write no solution. If the system has infinitely many solutions, write infinitely many solutions. y=2x+5
y=1/2x-1

Three times the sum of a number and seven is negative thirty-six. what is the number?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

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.