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3 years ago

PLEASE HELP..MATH 8TH GRADE

Mathematics

2 answers:

jolli1 [7]3 years ago

8 0

Answer. z = ± √10 = ± 3.1623

Dmitriy789 [7]3 years ago

4 0

Z = -16 the steps are in the photo

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What is the simplest form of 3 square root 27 a^3b^7?

4vir4ik [10]

$\sqrt[3]{27a^3b^7} = \sqrt[3]{3^3 \cdot a^3 \cdot b^6 \cdot b^} = 3ab^2(\sqrt[3]{b} )$

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3 years ago

F(x)=tan(x)

AleksAgata [21]

<span>Tan(x) = sin(x) / cos(x). Therefore, tan(x) pi/2 = 1/0, which doesn't exist. Imagine that, instead of 0, it's a number incredibly close to 0. The smaller the number in the denominator, the bigger the outcome. Therefore, we can think of 1/0 as infinity, or approaching infinity as one gets closer to 1/0. This is the same result approaching from the negative side, only it's negative infinity. If x=0, it's 0/1 instead (sin 0=0, cos 0=1). Anything divided by 1 is itself, so as x approaches 0, so does f(x).</span>

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3 years ago

As part of a study done for a large corporation, psychologists asked randomly selected employees to solve a collection of simple

zhenek [66]

Answer:

$P(A')=1-0.411=0.589$

And that represent the probability that they take longer than 7 minutes to solve the puzzles.

Step-by-step explanation:

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: $P(A)+P(A') =1$

On this case we have that n= 56 represent the employees selected to solve the puzzles.

We know that 23 out of the 56 selected solved the puzzles in less than 7 minutes.

Let's define the events A and A' like this:

A: Employees solved puzzles in less than 7 minutes

By the complement rule then:

A' : Employees solved puzzles in more than 7 minutes

Based on this we are interested to find the probability for A'

We can begin finding P(A), from the definition of probability we know:

$P(A)=\frac{Possible outcomes}{Total outcomes}$

For this case if we replace we got:

$P(A) =\frac{23}{56}=0.411$

And using the complemnt rule we got:

$0.411 +P(A')=1$

And solving for P(A') we got:

$P(A')=1-0.411=0.589$

And that represent the probability that they take longer than 7 minutes to solve the puzzles.

4 0

3 years ago

Please answer quickly,thanks you shall be marked a branliest<br>

Leviafan [203]

Answer:

18.0 cm to 1 decimal point.

Step-by-step explanation:

First work out the unknown side (s) of the right triangle using the Pythagoras theorem:

s^2 = 13^2 - 5^2

= 169 - 25 = 144

s = sqrt 144 = 12 cm.

Now consider the other triangle:

s = 12

The missing angle = 180 - 65 - 40 = 75 degrees.

By the Sine Rule:

x / sin 75 = 12 / sin40

x = 12 sin 75 / sin 40

= 18.03

3 0

2 years ago

Find the domain of the function.<br> f(x)=9x+7

Trava [24]

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

5 0

3 years ago

PLEASE HELP..MATH 8TH GRADE​

PLEASE HELP..MATH 8TH GRADE