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2 years ago

HELP PLEASE

Mathematics

2 answers:

scoundrel [369]2 years ago

8 0

Isolating the x^2 is the simplest way. it would only be three steps.

Alex777 [14]2 years ago

8 0

One note for isolating the variables, however. Make sure you take plus or minus the square root as both values are valid.

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insens350 [35]

Answer:

Step-by-step explanation:

he got an 80 so if that was his grade by answering 20 questions right then the correct answer would be 25 questions

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2 years ago

A store had a number of chairs in stock at the beginning of the week. During the week, 66 chairs were sold, leaving the store wi

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They had 81 chairs at the beginning

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3 years ago

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Factorize 2x^2-5/3xy-2y^2

vladimir1956 [14]

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2 years ago

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PLEASE HELP

dsp73

Answer:

All events are independent

Step-by-step explanation:

You are given the table

$\begin{array}{cccc}&\text{Chocolate}&\text{Vanilla}&\text{Total}\\\text{Adults}&0.21&0.39&0.60\\\text{Children}&0.14&0.26&0.40\\\text{Total}&0.35&0.65&1.00\end{array}$

Two events A and B are independent when

$Pr(A\cap B)=Pr(A)\cdot Pr(B)$

a) A="Chocolate"

B="Adults"

A and B="Chocolate and Adults"

$Pr(A)=0.35\\ \\Pr(B)=0.60\\ \\Pr(A\cap B)=0.21$

Since $0.35\cdot 0.60=0.21$ events are independent

b) A="Children"

B="Chocolate"

A and B="Children and Chocolate"

$Pr(A)=0.40\\ \\Pr(B)=0.35\\ \\Pr(A\cap B)=0.14$

Since $0.40\cdot 0.35=0.14$ events are independent

c) A="Vanilla"

B="Children"

A and B="Vanilla and Children"

$Pr(A)=0.65\\ \\Pr(B)=0.40\\ \\Pr(A\cap B)=0.26$

Since $0.65\cdot 0.40=0.26$ events are independent

4 0

3 years ago

Order these numbers from least to greatest.0.85,1/4,5/8,20%,0.3

Pavlova-9 [17]

1/4 = 0.25
5/8 = 0.625
20% = 0.20
So now we have: 0.20 < 0.25 < 0.3 < 0.625 < 0.85
So the solution is 20%, 1/4, 0.3, 5/8, 0.85

4 0

2 years ago