Answer:
21-(-7)=28
Step-by-step explanation:
1. Do same, change, opposite.
21-(-7)
21+7
=28
Write equations for both companies:
Company A = 80 + 0.30x
Company B = 20 + 0.50x
X = number of miles.
Set the equations to equal and solve for x:
80 + 0.30x = 20 + 0.50x
Subtract 0.30x from both sides:
80 = 20 + 0.20x
Subtract 20 from both sides:
60 = 0.20x
Divide both sides by 0.20:
x = 60 / 0.20
x = 300
The answer is 300 miles.
Answer:
B
Step-by-step explanation:
Look at the graph and you can see that 1 week later the plant grew 2 inches. if you look at the other choices it is false because it didn't corresponding to the graph.
Answer:

Step-by-step explanation:


It is representing a combination form where, n is number of items we have and r is the number of items we choose from n
Here, n = 6 , r = 2

=





Thus, 
11.4 → 11.8, 12.2, 12.6, 13.0, 13.4, 13.8, 14.2, 14.6 ← 15.0