I got this same question on a test, the answer is A.
Answer: 11 people
Explanation:
Find the total people who actually drink something:
120 - 17 = 103
Find the sum of people who drink cold and soft drink:
88 + 26 = 114
Find the people who drinks both:
114 - 103 = 11 people
You use a system of equations
x= coffee
y= donuts
x+y=100
3x+y=180
there’s 3 ways to solve system of equations substitution graphing and elimination. it would be easiest to use substitution here. So you multiply x+y=100 by -1 so it become -x-y=-100. then you combine it with the other equation and get 2x=80 so x=40 which means 40 cups of coffee were sold then you plug it back in to find y. 40+y=100. y=60.
y= 60 (donuts). x= 40 (coffee)
+ means: More than, Add, In Addition, Increased, In Excess, Greater.
<span>- means: Decreased by, Less than, Subtract, Difference, Diminished, </span>
<span>........Reduced, Remainder. </span>
<span>• or x means: Times as much, Percent of, Multiply, Product, Interest on. </span>
<span>/ or ÷ means: Divide, Quotient, Per. </span>
<span>(...) means: Quantity. </span>
<span>= means: Is, Was, Equal, Will be, Results.</span>
