
The formula of the sum of an arithmetic sequence:

We have:

substitute:

Answer: b. 21
Answer: 70 miles
Step-by-step explanation: scince the trip is 30% finished and that 30% was 21 miles you just have to multiply 21 by 3 which is 63and than you have to figure out what 1 third of 21 is which is 7 and than you just have to add 7 to 63. Hope this helps
Answer:
You just have to divide!
Step-by-step explanation:
400/570 = 0.70...
Answer:
h = -2.5
Step-by-step explanation:
- Apply the distributed property: -6h + 8h + 6 = 1
- Combine like terms: 2h + 6 = 1
- Subtract 6 from each side, so it now looks like this: 2h = -5
- Divide each side by 2 to cancel out the 2 next to h. It should now look like this: h = -2.5
I hope this helps!
Plot the points and do length times width to find the area.