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yaroslaw [1]
3 years ago
12

Simplify: 5 + 2(x + 3) - 8 + 4x +

Mathematics
1 answer:
julia-pushkina [17]3 years ago
4 0

Answer:

6x+3

Step-by-step explanation:

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There are 25 black cars, 15 blue cars, 21 red cars and 30 white cars what is the probability of getting a red car
Snezhnost [94]
There are 91 in total. Since there are 21 red cars, it would give you 21/91. Around a 23.07% chance.
7 0
2 years ago
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In testing the lethal concentration of a chemical found in polluted water. it is found that a certain concentration will kill 20
sasho [114]

Answer:

a) 0.1091

b) 0.9994

c) 0.5886

Step-by-step explanation:

X = the number of fish out of 20 that die after 24 hours

x = 0, 1, 2, . . . , 20

X~ Binomial (n= 20, p =0.20)

P(14 survive) = P(X = 6)

= nC_r p^r q^{n-r}= 20C_6 0.2^6\times0.8^{14}=0.1091

Similarly we can find out

P(at least 10 survive) = P( X <= 10 ) = (Using technology) = 0.9994

P(at most 16 will survive) = P(X <= 16) = (Using technology) = 0.5886

7 0
3 years ago
I’m pretty sure the correct answer is C. but I’d like to double check.
kobusy [5.1K]

4x + 1  → C

(f + g)(x) = f(x) + g(x) = 3x - 1 + x + 2 = 4x + 1


5 0
3 years ago
Factor the polynomial completely. 4x3 – 12x2 + 7x – 21 4x2(x – 3) + 7(x – 3) Which is the completely factored polynomial? 4x2(x
ankoles [38]
Regroup: (4x³-12x²)+(7x-21)
factor: 4x²(x-3)+7(x-3)
factor again: (x-3)(4x²+7)
4 0
3 years ago
Read 2 more answers
2 of 9
emmainna [20.7K]

Answer:

C

Step-by-step explanation:

You start with 3 and subtract a number

6 0
2 years ago
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