On Monday Joe bought 10 cups of coffee and 5 doughnuts for his office at the cost of $16.50. It turns out that the doughnuts were more popular than the coffee. On Tuesday he bought 5 cups of coffee and 10 doughnuts for a total of $14.25. Which equations could be used to determine the cost of the coffee?
STAAR Systems of Equations

Quiz
•
Mathematics
•
9th Grade
•
Hard
Anthony Clark
FREE Resource
9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
10c + 5d = 14.25
5c + 10d = 16.50
10c + 5d = 16.50
5c + 10d = 14.25
c + d = 10
5c + 10d = 16.50
c + d = 5
5c + 10d = 16.50
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
This system has _____ solutions
0
1
2
Infinitely many
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine if (4, 1) is a solution for the system of equations.
y = -x + 5
y = 2x - 7
yes
no
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The equations of two lines are:
2x-y=4 and y=-2x+8.
What is the value of x in the solution for this system?
x=8
x=3
x=11
x=5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A
B
C
D
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
8.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
9.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
There are 15 plates in a kitchen cabinet. The diameter of each plate is either 7 inches or 12 inches. The diameter of all 15 plates combined is 140 inches. Which system of equations can be used to find the number of 7-inch plates, x, and the number of 12-inch plates, y, that are in the cabinet?
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