First you find the price after tax. You multiply 40 times .085 add that answer (3.4) and get 43.4. After that you get the tip. You multiply 43.4 times .18 and add that answer ( 7.8) and get 51.21.
Answer:
4320$
Step-by-step explanation:
840 : 7(days of week)=120$
120 × 36(days) =4320
You have to use the Geometric Mean for triangles to find x. Our form will look like this:

which simplifies to

. Cross multiply to get

. Therfore, x = 4. Usually when we take the square root of a number we will end up with both the principle (positive) root and the negative one as well. But since the 2 things in math that will never EVER be negative are time and distance/length, we will not consider the -4. x = 4
Let x = the # jujubes Sam had
he gave x/2 to jen
jen eats half of it = 1/2(x/2) = x/4
the remaining x/4 he gave to kyle
kyle kept 8 and gave 10 to Kim
so
x/4 - 8 = 10
x/4 = 18
x =72
thus jen had 36 jujubes
jen eat 18 jujubes