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Mathematics

2 answers:

raketka [301]3 years ago

7 0

Take a look at the tree diagram. The first branching shows the probabilities of there being oil, or not being oil.

Then, for each case we consider the probabilities of the kit being accurate or not.

we are interested in the branch Oil---Kit accurate---

Since P(Oil)=0.45, and P(Kit accurate)=0.8, the probability of there being oil and the Kit showing it correctly is:

0.45*0.8=0.36.

Answer: C) 0.36

fenix001 [56]3 years ago

5 0

The answer is C 0.36

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Write the expression using exponents.

pogonyaev

Answer:

6v^5

Step-by-step explanation:

you would leave the 6 alone. since there is 5 of the same variable, you would put 5 as your exponent

4 0

2 years ago

to rationalize the denominator of 5 - sqrt. 7/ 9 - sqrt. 14, you should mulitply the expression by which fraction?

timofeeve [1]

Answer:

9+sqrt(14)

------------------

9+sqrt(14)

Step-by-step explanation:

When we rationalize the denominator, we need to multiply by the conjugate

The denominator has a-sqrt(b), we multiply by a+sqrt(b)

Since we have 9 -sqrt(14), we need to multiply by 9+sqrt(14)

What we do to the bottom, we do to the top, so multiply by 9+sqrt(14) over 9+sqrt(14) which is equal to 1. This does not change the equation.

9+sqrt(14)

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4 0

3 years ago

Given: 5x + 3 > 4x + 7. Choose the graph of the solution set.

Dimas [21]

<h3>Answer:</h3>

$\boxed{\boxed{\pink{\bf \leadsto Option \ A \ is \ correct . }}}$

<h3>Step-by-step explanation:</h3>

For the number line refer to the attachment :

A linear inequality is given to us . And we need to find the correct number line. So the given linear inequality is :-

$\bf \implies 5x + 3 > 4x + 7 \\\\\bf\implies 5x - 4x > 7 - 3 \\\\\bf\implies \boxed{\red{\bf x > 4 }}$

This implies that the value of x is Greater than 4 . That is the inequality can have all the values more than 4. So when we see the given number lines we see that the first number line represents all values greater than 4 .

<h3>Hence the first graph of the solution set represents the given linear inequality.</h3>