Which is the product of (3)(7) and why?
a-21 because you are adding 7 times, the number 3
b-21 because you are adding 3 times, the number 7
c 21 because you are adding 7 times, the number 3
d21 because you are adding 3 times, the number 7

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.