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JulijaS [17]
3 years ago
13

Evaluate the algebraic expression: (20 - (-2)) = 11

Mathematics
2 answers:
kogti [31]3 years ago
6 0

Answer:

the answer is 22 not 11

Step-by-step explanation:

(20-(-2))

we change the sign of the number being subtracted and treat the operation as addition instead

so it's

(20+2)=22

telo118 [61]3 years ago
5 0

Answer:

false

Step-by-step explanation:

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Trava [24]

Answer:

88.88% probability that it endures for less than a year and a half

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

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In this question, we have that:

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One year has 52.14 weeks. So a year and a half has 1.5*52.14 = 78.21 weeks.

So this probability is the pvalue of Z when X = 78.21.

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Z = \frac{78.21 - 66}{10}

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Step-by-step explanation:

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6.25 x 10^-2 in standard notation​
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Answer:

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Step-by-step explanation:

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