13 A group of three friends order a combo meal which
includes two slices of pizza
and a drink. Each drink is
priced at $2.50. If the
combined total is $31.50, how
much is the cost of a slice o
pizza?

Step-by-step explanation:

if I understand correctly, then the 3 friends ordered a combo meal each.

so, 3 drinks and 3×2 = 6 slices of pizza are ordered.

and that costs in total $31.50.

each drink costs $2.50.

so, the calculation is (with x being the price of a pizza slice) :

3×2.5 + 6x = 31.5

7.5 + 6x = 31.5

6x = 24

x = 4

so, each slice of pizza costs $4.

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.