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Maslowich
2 years ago
9

Rolling a 5 on a fair number cube?

Mathematics
1 answer:
Vladimir79 [104]2 years ago
7 0

If it is a 6-sided cube, you have a 1/6 chance of landing on a 5.

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Which of the following is a solution of x2 + 2x + 4?
kifflom [539]

Answer:

−1 + i times the square root of 3

is the answer.

Step-by-step explanation:

Given is a quadratic equation in x

x^2+2x+4\\= x^2+2x+1+3\\=(x+1)^2+3

using completion of squares method

Equate to 0

(x+1)^2+3 =0\\(x+1)^2 = -3\\

Take square root

(x+1) = \sqrt{-3} =±i\sqrt{3}

Subtract one from both sides

x = [/tex]-1±i\sqrt{3}[/tex]

The last option namely

−1 + i times the square root of 3 only matches with our answre

Hence last option is right.

4 0
2 years ago
Helppp needed ( answer quickly)
ale4655 [162]

Answer:

C. 57

Step-by-step explanation:

all triangles add up to 180. the tick marks show that ∠D and ∠ E are congruent so you do this and solve for x:

(4x + 1) + (4x + 1) + (5x - 4) = 180

13x - 2 = 180

13x = 182

x = 182/13

x = 14

4(14) + 1 = 57

3 0
3 years ago
15 is what percentage of 25
prisoha [69]
Your answer to this question would be 60 percent hope this helps
6 0
3 years ago
Read 2 more answers
What is the domain of this function in the graph below? <br><br> What is the interval?
Maurinko [17]
Domain in interval: [6,infinity)
5 0
2 years ago
Sara reads 250 words per minute for 2 hours and gets tired and reads 125 words per minute for 3 hours. on average how many words
brilliants [131]
<span>250*(2*60)=30000
125*(3*60)=22500
22500+30000=52500
52500:((3+2)*60)=175 (</span><span>words per minute)</span>
5 0
3 years ago
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