1.
Solve
n
– 2 = 5.
A.
–7
B.
3
C.
–3
D.
7
Hint
2.
The number sentence below is false. Make the sentence true by changing one symbol or number. Find the correct number sentence.
5
2
– 21 = 5 × 4 + 8
A.
5
2
– 21 = 5 × 5 + 8
B.
5
2
– 21 < 5 × 4 + 8
C.
5
2
– 21 > 5 × 4 + 8
D.
6
2
– 21 = 5 × 4 + 8
Hint
3.
Fill in the ovals for the flowchart.
A.
10, 20, 18
B.
10, 5, 3
C.
21, 11.5, 9.5
D.
3, 5, 10
Hint
4.
Use the flowchart to backtrack and find the solution.
A.
B.
C.
11
D.
14
Hint
5.
Find a solution to the equation using guess-check-and-improve. Give the solution to the nearest tenth.
k
· (18 +
k
) = 67.84
A.
k
= 13.2
B.
k
= 13.5
C.
k
= 9.8
D.
k
= 3.2
Hint
6.
Which equation would it be easiest to solve using the backtracking method?
A.
r
· (4 –
r
) = 32
B.
C.
D.
r
2
+
r
= 15
Hint