Prove: If the number a+7b is divisible by 17 , then the number 10a+2b is divisible by 17

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

Urgent? will give brainliest to the first correct answer what is the area of the figure?

Jenny made a scale drawing of a city. the scale she used was 5 inches = 1 yard. what is the scale factor of the drawing?