First term is -7, so a_1 = -7

To get the next term, we add on 4. We can see this if we subtract like so
d = (2nd term) - (1st term) = (-3) - (-7) = -3+7 = 4

So d = 4 is the common difference.

Apply a_1 = -7 and d = 4 to get...
a_n = a_1 + d*(n-1)
a_n = -7 + 4*(n-1)
a_n = -7 + (n-1)*4

Answer: Choice A

4 0

4 years ago

3. Eric filled 3/4 buckets with sand. Then he filled

Sedbober [7]

Answer:

472 3/4

Step-by-step explanation:

Consider the meaning of "one, and one more". That does not mean zero (1-1). Rather, it means two (1+1).

Then 3/4 and 472 more is ...

$\dfrac{3}{4}+472=472\frac{3}{4}$

Eric has 472 3/4 buckets filled with sand.

_____

The problem statement here seems to be focused on the filled buckets, rather than the sand stockpile that Eric is working from. The amount in that stockpile is being reduced by the amount that is being used to fill buckets. In short, whether you add or subtract depends on what you're trying to figure.

5 0

3 years ago

a laptop was originally sold for $975. The laptop is now on sale for $828.75. what is the percent markdown?

zloy xaker [14]

Answer: 15%

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers