Please help me prove or disprove this: 'If a number's last digits are 1, 2, and 5, then the number is divisible by 125'

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

Tom drove 206 miles in 3.9 hours. estimate his average speed.