Answer:
20*(20+1)/2 = 210
Step-by-step explanation:
Answer:
64
Step-by-step explanation:
x+8x+(8x-16)=154
17x=170
x=10
10+80+64=154
Answer:
B. 434
Step-by-step explanation:
sorry for the late response! it’s 434. I worked out the problem & took the test, B is the correct answer.
10 15 20 25 30....etc hope this helps you!!