What's the sum of the integers from 1 to 300?
Answer(s): B
The formula to find the sum of a finite arithmetic sequence is S =n/2(a+b), where n is the number of terms, a is the first term in the sequence, and b is the last term in the sequence.In this case there are 300 terms (n), and the first term is 1 and the final term is 300.S = n/2(a + b)S = 300/2(1 + 300)S = 150(301)S = 45,150
(y2)3 = __________.
(y2)3 is the same as (y2)(y2)(y2). Multiply exponents with the same base by keeping the base and adding the exponents: (y2) (y2) (y2) = y6.
If y = 6, then 2y × y = __________.
Substitute 6 for y the equation: 2(6) × 6 = 12 × 6 = 72.
If 0.05x = 1, then x equals __________.
To check your answer, substitute 20 for x in the original equation.
25x2 = __________.
Answer(s): C
25x2 = (5x)2 = 5x2
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