Answer:
780
Step-by-step explanation:
So when you're adding consecutive numbers like this. 1+2+3...+39. You add 39 and 1. This is 40. 2+38 is 40. This is a pattern. Now, we do 40 multiplied by 39 and this will give you the number 1620. After this you would have to divide this product by 2. The answer will soon be 780.
Answer:
x=15
Step-by-step explanation:
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hope it helped u
Answer:
(
4
a
+
4
b
+
3
)
(
2
a
+
2
b
−
3
)
Step-by-step explanation:
