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.

hence, the required result is

step-by-step explanation:

suppose we have two matrices a and b

we will assume the two matrices

we have to compute b-a which means subtracting corresponding elements of a from b.

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a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?