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3 years ago

What are the odd of rolling two number cubes and getting the sum of 7

1 answer:

8 0

Number of possible outcomes of one cube = 6
Number of possible outcomes of the other cube = 6 
Number of possible outcomes of two cubes = 6 x 6 = 36 

Number of ways to roll a sum of 7 with two cubes = 6 

1 - 6 
2 - 5 
3 - 4 
4 - 3 
5 - 2 
6 - 1

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3 years ago

Which of the following expressions correctly uses the properties of summations to represent

madam [21]

Answer:

Option C is correct.

$7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Step-by-step explanation:

Given the expression: $\sum_{i=1}^{18} (7i^2+9)$

Using properties of summation:

$\sum_{i=1}^{n} (a+bi) =\sum_{i=1}^{n} a + \sum_{i=1}^{n} bi$

$\sum_{i=1}^{n} a = an$

Using properties of summation in the given expression we have;

$\sum_{i=1}^{18} (7i^2+9)$

= $\sum_{i=1}^{18} 7i^2 + \sum_{i=1}^{18} 9$

= $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Therefore, the following given expression uses the properties of summation to represents is, $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

8 0

3 years ago

Read 2 more answers

1. (01.02)

Anton [14]

Answer:4

Step-by-step explanation:

f(1)=6(1)+2

g(f(1))=2(8)+4/5

=20/5

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3 years ago