math
posted by 5ony .
if y equals x ( x +3) then 3 y equals

math 
Anonymous
y=x(x +3)
3y=3x(x+3)
3y=3x*x+3x*3
3y=3x^2+9x
Respond to this Question
Similar Questions

PreAlgebra
If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule? 
PreAlgebra
If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule? 
algebra ll
solve the system of equation. 4x  3y equals 14 y equals 3x plus 4 and another following up 4x  3 equals 8 2x plus 5y equals 9 thatnk u for the help 
algebra
Could someone show me how to solve this joint variation problems? 
math
write the equation 5x plus y equals 2 which equals 0 in normal form. my ans. was y equals 5 plus negative 2 or y equals 5 plus 2. if im wrong plus correct and explain why im wrong thank you. 
macroecon
If the MPC equals.7 and the MPI equals .1 then the varible net export spending multiplier equals? 
Math
1. 24 quarts equals 6 gallons? 2. 5 cups equals 40 quarts? 
geometry
Construct trapezium ABCD so that BC equals 6cm,AB equals 3cm,Angle B equals 80degrees and angle C equals 70 degrees.measure BD 
maths
f(x)equals to 2x is in form of y equals to ax or y equals to af(x) (if f(x)equals to x) plot f(x) equals to 2x 
math
Let f of x equals 4 for x less than or equal to 3 and equals the quantity 7 minus x for x greater than 3. Use geometric formulas to evaluate the integral from x equals 1 to x equals 7 of f of x, dx. I got 16 but i dont think it is …