Answer:
see explanation
Step-by-step explanation:
The n th term of an AP is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given
6(a₁ + 5d) = 13(a₁ + 12d) ← distribute parenthesis on both sides
6a₁ + 30d = 13a₁ + 156d ( subtract 13a₁ from both sides )
- 7a₁ + 30d = 156d ( subtract 30d from both sides )
- 7a₁ = 126d ( divide both sides by - 7 )
a₁ = - 18d
Now
a₁₉ = a₁ + 18d = - 18d + 18d = 0 ← as required
Answer:
17F
Step-by-step explanation:
(-2F) +(19F) = 17F
The signed numbers add in the usual way. (If you really can't do this in your head, a calculator can help.)
Answer:
The answer is 675.75
Step-by-step explanation:
159 × 4.25= 675.75
The answer is A because slope is equal to the<span> change in </span>y<span> over the change in </span>x. Substitute in the values of x and y into the equation to find the slope.<span>m=<span><span><span>3.1−<span>(6.1)/</span></span><span>−2.5−<span>(−5.5)</span></span></span></span></span>
