Answer:
2 months
Step-by-step explanation:
you can set up equations for each sister:
(Sarah) y = 3x + 30
(Anna) y = -2x + 40
you can graph them to find where they intersect (2,36) or:
you can set them equal to each other like the following:
3x + 30 = -2x + 40
5x = 10
x = 2
640×3= 1,920 Then you don't need to estimate it since it's estimated.
hope this helps :-)<span />
10x10 is 100
it's basically 10^2
Step-by-step explanation:
he answered seven of the multiple choice questions and answered one of the true or false questions that is;
7×2+1=14
