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2 years ago

10 small and 8 large cost $192. 20 small and 1 large cost $99. What is cost of a small

Mathematics

2 answers:

seraphim [82]2 years ago

7 0

Answer:

Step-by-step explanation:

small=s, s=3.99

large=l, l=19.20

10s+8l=192.20

20s+l=99

we can see that in the second equation, 20s+l=99

l=99-20s

lets replace l in the first equation

10s+8(99-20s)=192.20

10s+792-160s=192.20

-150s=-792+192.20

150s=599.80

s=3.99

l=99-20(3.99)=99-79.80=19.20

Sphinxa [80]2 years ago

6 0

Answer:

Step-by-step explanation:

You can set up a system of equations.

x=small, and y = large.

10x+8y=$192

20x+1y=$99

you can multiply the first equation by -2 to get rid of x:

20x+1y=$99

-20x-16y=-$384

when you combine them, you get:

-15y=$-285

you can divide by -15 and you get:

y=19, so 1 large equals $19

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