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Liula [17]
2 years ago
8

Given 3 + 7 + 11 + 15 + ... find S20

Mathematics
1 answer:
nasty-shy [4]2 years ago
6 0
=4n - 1
Since the sequence is add 4 and 3-4 = -1

20 x 4n = 80-1 = 79
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How is 17 + 26 different from 36 + 53? Explain ( this is regrouping lesson)
xxMikexx [17]
17+26 is different from 36+53 by if you add 17+26 the sum would be 43. And if you add 36+53 the sum would also be 89. So that means the way how they are  different is that the 17+26 and 36+53 has different kinds of sums. They have different kinds of sums because you are different numbers.
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6 0
3 years ago
257 whole number,integer number, or rational number
aliya0001 [1]
257 is a whole number, interger, and a rational number.
8 0
3 years ago
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Which are the correct classifications for the polygon?
Yakvenalex [24]
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4 0
3 years ago
Expand the binomial using Pascal's triangle<br> (3x+5)
forsale [732]

Answer:

Step-by-step explanation:

0.           1

1.          1  1

2.         1  2  1

3.        1  3  3  1

4.       1  4  6  4  1

5.      1  5  10  10  5  1

6.     1  6  15  20  15  6  1

7.    1  7  21  35  35  21  7  1

8.   1  8  28  56  70  56  28  8  1

4 0
3 years ago
Their sum is − 1/3 and their difference is 18
Rina8888 [55]

Answer:x=53/6 and y=-55/6

Step-by-step explanation:

Let the first number x

Second number b y

Sum of the numbers x+y=-1/3

x-y=18

Solve simultaneously

Using elimination method

We get

2y=-55/3

y=-55/6

Substitute for y in equation 1

x+55/6=18

x=18-55/6

x=53/6

6 0
3 years ago
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