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3 years ago

Whats the answer please

Mathematics

1 answer:

slava [35]3 years ago

7 0

Answer:

A) 4

Step-by-step explanation:

The reason why the answer is four is because,

130 = 33x - 2 (These two angles are alternate exterior angles)

=> 130 + 2 = 33x

=> 132 = 33x

=> 132/33 = x

=> 4 = x

If my answer helped, please mark me as the brainliest

Thank you!

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(1 Euro [€] = $1.25 us) how many US dollars is there for 10€?

stiv31 [10]

I think it's $11.79 but I'm not entirely sure

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3 years ago

{(3,5),(-2,1),(4,3),(-1,4)} is each of these relation's a function?

marysya [2.9K]

Answer:

It is not a function.

Step-by-step explanation:

{(3,5),(-2,1),(<u>4</u>,3),(-1,<u>4</u>)}

A function is a special type of relation. In a function, no two ordered pairs have the same first component.

This relation has two 4s.

4 0

3 years ago

Let a=3/5 and let b=2/3. Compute a^2b^-3.

Amanda [17]

Answer: 81/100

Step-by-step explanation:

I don't guarantee you I am right but..

first, solve for the exponents after substituting the numbers in

3/5 x 3/5 is 9/25

since b's exponent is negative, you change the fraction into its reciprocal and then do it with the exponent but positive

2/3^-3 to 3/2^3 and 3/2 x 3/2 is 9/4

then you mutiply both numbers to get 9/4 x 9/25 is 81/100

7 0

2 years ago

4,11,6,9,23,34,6,9

ludmilkaskok [199]

Answer: 9

Step-by-step explanation:

If you put all the numbers in order from least to greatest 9 is in the middle.

4 0

4 years ago

Read 2 more answers

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.

3 0

3 years ago

Whats the answer please​

Whats the answer please