Answer A and E
Step-by-step explanation:
I did this question
In order to find the three possibilities, you must first think of common factors between 30 and 12:
Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Factors of 12: 1, 2, 3, 4, 6, 12
We can find three common factors between the two numbers: 2, 3, and 6. So these are three widths that we can use. The length can be found by factoring out the numbers from 30+12x (we can't factor out x):
30+12x=2(15+6x) Width: 2 Length: 15+6x
20+12x=3(10+4x) Width: 3 Length: 10+4x
20+12x=6(5+2x) Width: 6 Length: 5+2x
Answer:
4
Step-by-step explanation:
i took the test and got it right
Answer:
-499,485.
Step-by-step explanation:
We can transform this to an arithmetic series by working it out in pairs:
6^2 - 7^2 = (6-7)(6+7) = -13
8^2 - 9^2 = (8-9)*8+9) = -17
10^2 - 11^2 = -1 * 21 = -21 and so on
The common difference is -4.
The number of terms in this series is (998 - 6) / 2 + 1
= 992/2 + 1 = 497.
Sum of n terms of an A.S:
= n/2 [2a1 + (n - 1)d
Here a1 = -13, n = 497, d = -4:
Sum = (497/2)[-26 - 4(497-1)]
= 497/2 * -2010
= -499,485.
