Answer:
You add on the equation like the example below
Step-by-step explanation:
The sequence is an arithmetic one with first term a1=−4 and difference d=2 . To calculate a9 we use the formula: an=a1+(n−1)⋅d. Here we have: a9=−4+(9−1)⋅2=−4+8⋅2=−4+16=12.
Answer:
10
Step-by-step explanation:
Pythagorean theorem
c² = a² + b²
26² = a² + 24²
a² = 26² - 24² = 100
a = √(100) = 10