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aleksklad [387]
3 years ago
14

Which of the following is a prime number? 99, 53, 117, 121

Mathematics
2 answers:
Schach [20]3 years ago
7 0
53 is a prime number
Ierofanga [76]3 years ago
3 0

Answer:

53

Step-by-step explanation:

99 can be divisible by 9, 11, 3, and 33. 117 can be divisible by 11 (11x11)

and 117 can be divisible by 1, 3, 9, 13, and 39.

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Answer:

B)2

Step-by-step explanation:

I think it is 2 but Im not percent. Hope this helps

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3 years ago
The question is below​
Cloud [144]

Answer:

See below.

Step-by-step explanation:

a.

The first figure has 1 square. The second figure has a column of 2 squares added to the left. The third figure has a column of 3 squares added to the left. Each new figure has a column of squares added to the left containing the same number of squares as the number of the figure.

b.

Figure 10 has 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55 squares.

c.

The formula for adding n positive integers starting at 1 is:

1 + 2 + 3 + ... + n = n(n + 1)/2

For figure 55, n = 55.

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d.

Let's use the formula set equal to 190 and solve for n. If n is an integer, then we can.

n(n + 1)/2 = 190

n(n + 1) = 380

We know that 380 = 19 * 20, so n = 19.

Answer: yes

e.

Use the formula above,

S = n(n + 1)/2, where S is the sum.

f.

n(n + 1) = 1478

38 * 39 = 1482

37 * 38 = 1406

3 0
3 years ago
The angles of a triangle must add up to ___ degrees ?
FrozenT [24]
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Aiko is finding the sum (4 + 5i) + (-3 + 7i). She rewrites the sum as (-3 + 7)i + (4 + 5)i. Which statement explains the
Doss [256]

Answer:

Aiko should not have put both of the 'i' out of the brackets.

Step-by-step explanation:

As only one integer has i with it, it is not possible to take the i out of the bracket.

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Step-by-step explanation:

hope this helps have a good rest of your day :) ❤

3 0
3 years ago
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