Unit Test — Unit test Answers
0 verified answers2 views
21
Free Preview
A motorboat travels 9 miles downstream (with the current) in 30 minutes. The return trip upstream (against the current) takes 90 minutes.Which system of equations can be used to find x, the speed of the boat in miles per hour, and y, the speed of the current in miles per hour? Recall the formula d = rt.
A
9 = 0.5(x – y) 9 = 1.5(x + y)B
9 = 1.5(x – y) 9 = 0.5(x + y)C
0.5 = 9(x – y) 1.5 = 9(x + y)D
1.5 = 9(x – y) 0.5 = 9(x + y)22
Free Preview
What is the solution to the system of equations?y = x – 102x + y = 4
A
(–8, 6)B
(–6, 16)C
(6, –8)D
(16, –6)23
y=x – 6x=–4
A
(–8, –4)B
(–4, –8)C
(–4, 4)D
(4, –4)24
Mira picked two numbers from a bowl. The difference of the two numbers was 4, and the sum of one-half of each number was 18. The system that represents Mira’s numbers is below. x – y = 4x + y = 18Which two numbers did Mira pick?
A
10 and 8B
18 and 4C
20 and 16D
40 and 3225
What is the x-value in the solution to this system of linear equations?2x − y = 11x + 3y = −5
A
−3B
−1C
2D
4Did you find these answers helpful?
Verified answers available
TRY EDGENUITY HACKS
- Auto Complete Exams
- Auto Complete Assignments
- Skip Videos Instantly
50,000+ students using this