The answer is C: the missing number is 25
Answer:
a = 1, b = 3.
Step-by-step explanation:
a + b = 4
a - b = -2 Adding to eliminate b:
2a = 2
a = 1
So 1 + b = 4
giving b = 3.
Answer:
A. 6.9
Step-by-step explanation:
Edge 2020
-15+2 means you add 2 to the negative number 15 so -15+2 will give us -13 which is the answer.