A group of 18 people ordered soup and sandwiches for lunch. Each person in the group had either one soup or one sandwich. The students cost $7.75 each and the soups cost $4.50 each. If the total cost of all 18 lunches would we $113.50, how many sandwiches were ordered?

10 sandwiches

Step-by-step explanation:

first, write an equation to model the problem.

if x is the number of sandwiches and y is the number of soups, you can write:

7.75x + 4.5y = 113.5

in addition, to figure out the number of lunches, you can write:

x + y = 18

finally, plug both equations into desmos and see which point makes both equations true.

the point is (10, 8)

this means they ordered 10 sandwiches and 8 soups

if this helped, please mark brainliest :)

7

step-by-step explanation:

homozygous. one is homozygous, while two is heterozygous.