Seven times a number is equal to 12 more that 3 times the number. find the number

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

Write the equations in logarithmic form 7^3=343

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?