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3 years ago

Which expression is equivalent to 6(14)? A:6(10 + 4) B:6(10 + 14) C: 6(1 + 40) D: 6(10 + 40)

Mathematics

1 answer:

Mashcka [7]3 years ago

3 0

6(14) = <span>6(10 + 4)

answer
</span><span>A:6(10 + 4)</span>

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What divide by what equals 0.4545......

Arturiano [62]

Answer:

5/11

Step-by-step explanation:

let x=0.4545...

100x=45.4545...

100x-x = 99x=45.4545... - 0.4545...=45

x=45/99=5/11

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3 years ago

Which is the solution to the system of equations? y=−3/2x−11/2; 6x+y=−4

cupoosta [38]

Answer:

x= 1/3 and y=−6

Step-by-step explanation:

If you want step by step explanation you can get your explanation from

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3 years ago

Convert 1 2/5 x 2/3 into a mixed number

zavuch27 [327]

It simplifies to the proper fraction 14/15 so it cannot be a mix number

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3 years ago

A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 70

TEA [102]

Answer:

She needs to sample 189 trees.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

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

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

The standard deviation of the population is 70 peaches per tree.

This means that $\sigma = 70$

How many trees does she need to sample to obtain an average accurate to within 10 peaches per tree?

She needs to sample n trees.

n is found when M = 10. So

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

$10 = 1.96\frac{70}{\sqrt{n}}$

$10\sqrt{n} = 1.96*70$

Dividing both sides by 10:

$\sqrt{n} = 1.96*7$

$(\sqrt{n})^2 = (1.96*7)^2$

$n = 188.2$

Rounding up:

She needs to sample 189 trees.

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3 years ago

Pat's pizza sells pizzas for $9 plus .50 for each topping added to get the total cost of the pizza. Which is the dependent varia

sashaice [31]

The dependent variable is the cost of the pizza.

The Independent variable (or what you manipulate) is the toppings of the pizza, and the dependent variable (or what changes because you manipulated something) is the total cost of the pizza

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3 years ago