Solve it by substitution. First let's rewrite the first equation (3x+4y=16) so we have y = something, then we'll substitue that in to the other equation.
3x+4y=16
4y=-3x+16
y=-3/4x+4
Now we can substitute this into the other equation.
30 because 5x6= 30. All you have to do if the fractions are already simplified, is multiply the denominators together.
60 is the base OK. I think am right
The original was expanded...
Answer:

Step-by-step explanation:
The formula of a lateral area of a cone:

r - radius
l - slant height
The formula of a surface area of a cone:

We have r= 9mm and l = 17mm. Substitute:

