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3 years ago

Hey...hey there, mind to help? ahahah please?

Mathematics

2 answers:

Alexandra [31]3 years ago

8 0

Answer:

Hey! I hope you're doing well, I know school is exhausting ok enough jabbering here's the answer:

Step-by-step explanation:

100ft squared. So first find the area of the rectangle which is 9*8 = 72. Formula $A = b *h$ Now find the area of the triangle

Formula $A = \frac{b *h}{2}\\$

Answer: 28ft squared

Now add those areas together and you'll get= 100ft squared, hope this helps!

Romashka [77]3 years ago

7 0

Answer:

28ft

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Step-by-step explanation:

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Simplify the expression. 5(x + 10) + x

Free_Kalibri [48]

Answer:

6x+50

Step-by-step explanation:

we need to distribute the 5 first

5x+50+x

then

6x+50

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3 years ago

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If the value of a changes in response to the value of b then b is the _____?

Alex17521 [72]

B is the independent variable, while y is the dependent variable.

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3 years ago

The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st

Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$2 = 2.575*\frac{7.8}{\sqrt{n}}$

$2\sqrt{n} = 2.575*7.8$

$\sqrt{n} = \frac{2.575*7.8}{2}$

$(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}$

$n = 100.85$

Rounding up

We need a sample size of at least 101

8 0

3 years ago

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8 cubed in standard form and exponential form

masya89 [10]

Answer:

so 8 cubed (8 × 8 × 8) in standard form is: 512

so 8 cubed (8 × 8 × 8) in exponential form is: 8³

Step-by-step explanation:

As we know that

The cube of any given number is that number times itself.

For example, 8 cubed, denoted by 8³ is equal to 8 × 8 × 8.

An exponent basically indicates the number of times we must multiply the base number. For example, to compute 8³, we multiply 3 three times (8×8×8).

so 8 cubed (8 × 8 × 8) in standard form is: 512

so 8 cubed (8 × 8 × 8) in exponential form is: 8³

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3 years ago

A triangle has side lengths of 6,8, and 9 what type of triangle is it

Strike441 [17]

9^2 < 6^2 + 8^2

so its acute angled.

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3 years ago