If there are 20 groups of 10, then there are 200 pencils. Subtract 200 and 137 to get the number of dull pencils.
X - 4 = -4 -4
Combine the two -4.
X - 4 = -8
Add 4 on both sides to isolate the x and get your answer.
X = -4
2 - 3x = -x - 8
Subtract the 2 on both sides.
-3x = -x - 10
Add the x on both sides.
-2x = -10
Divide by -2 on both sides to isolate the x and get your answer.
x = 5
Step-by-step explanation:

Since the sequence is arithmetic, we have an expression of the form:

Where,
a1: first term of the sequence
d: common difference
n: number of terms
We look for the common difference:

Then, setting values we have:

Then, the sum of the terms is:

Substituting values:
Answer:
the sum of the arithmetic sequence 8, 15, 22 is:
Sn = 2483
Answer:
Y=2x-5
Step-by-step explanation:
Parallel m=2
Y=mx+c
-1=2(2)+c
C=-5