Answer:
6.856
Step-by-step explanation:
You square root 47 because in order to get rid of the squared on the variable a, you have to square root both sides. Once you do that you will get 6.8556546 and because you wanted it rounded to the nearest hundredth, it is 6.856
a= 8.6
just plug it into a calculator, it's easier. the square root of 47 is 6.85565
-1
The y-intercept is where the line crosses the y-axis.
13/20 = 0.65
0.65 x 100 = 65
They got a 65.
3*4x+3*5y
12x+15y
2*3x*2+2*7.5y