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lana [24]
3 years ago
13

Help with 16-25 Please. a=12, b=9, c=4

Mathematics
2 answers:
tensa zangetsu [6.8K]3 years ago
7 0
Its none of them..its actually -9
allochka39001 [22]3 years ago
5 0
16. Would be 144 + 9 - 16, which equals 137.
17. 81 + 24 - 16 = 89.
18. 8(12+9) = 168. 
19. 48 + 18 - 16 = 50
20. 144/ 36 + 4= 8
21. 16 (18-12)= 96.
22. 144 + 12 / 4= 39.
23. 128 - 108 /4= 5
24. 18-20= -2
25. 81 - 32 / 12 +4 -9= 7
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The probability that a randomly selected elementary or secondary school teacher from a city is a female is , holds a second job
julsineya [31]

Answer:

The probability that an elementary or secondary school teacher selected at random from this city is a female or holds a second job is 0.90.

Step-by-step explanation:

Denote the events as follows:

<em>X</em> = an elementary or secondary school teacher from a city is a female

<em>Y</em> = an elementary or secondary school teacher holds a second job

The information provided is:

P (X) = 0.66

P (Y) = 0.46

P (X ∩ Y) = 0.22

The addition rule of probability is:

P(A\cup B)=P(A)+P(B)-P(A\cap B)

Use this formula to compute the probability that an elementary or secondary school teacher selected at random from this city is a female or holds a second job as follows:

P(X\cup Y)=P(X)+P(Y)-P(X\cap Y)\\=0.46+0.66-0.22\\=0.90

Thus, the probability that an elementary or secondary school teacher selected at random from this city is a female or holds a second job is 0.90.

4 0
3 years ago
What is the best approximation of the solutions to the system to the nearest integer values?
Aleksandr-060686 [28]
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Example:  D:  (5)-5 = 2((-7) + 7) leads to 0 = 0.  Is that true?  If so, D is likely the correct answer. 
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3 years ago
Ebony earned scores of 72 70, 81, 99, and 88 on five math tests. Determine her
Minchanka [31]

Let it be x

\boxed{\sf Average=\dfrac{Sum\:of\:terms}{No\:of\:terms}}

\\ \sf\longmapsto \dfrac{72+70+81+99+88+x}{6}=83

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\\ \sf\longmapsto 410+x=498

\\ \sf\longmapsto x=498-410

\\ \sf\longmapsto x=88

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3 years ago
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