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3 years ago

Can some one please answer these questions I will give you a brainliest

Mathematics

2 answers:

solniwko [45]3 years ago

5 0

2×2=4 ( for one face)
so there r 6 faces = 6×4=24 square inches

baherus [9]3 years ago

4 0

Since it was already 1 inch and it’s getting increased by 2 inches, it’s 3 inches now. 3x3 is 9, so that’s the area. To get surface area, you multiply 9 by 6 to get 54.

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3 2/3 = 2 + N/3 solve for N

Charra [1.4K]

If the question is 3*2/3=2+N/3
N=0

If the question is 2/3=2+N/3
N=-4

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3 years ago

The complement of an angle measures 20 more than the angle. Find the number of degrees in the angle

padilas [110]

Let the measure of its complement be x°.
then, measure of angle = (x + 20)°. and measure of angle = (35 + 20)° = 55°

6 0

3 years ago

Read 2 more answers

PLEASE HELP ME!!!! WORTH 10 POINTS!!!

Sidana [21]

slope
m = (1 - 1)/(0 + 2) = 0

(x1, y1) as (-2, 1)

point-slope form
y - y1 = m(x - x1)
y - 1 = 0(x + 2)
y - 1 = 0
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7 0

3 years ago

!HELP ASAP WOULD BE APPRECIATED! The expression to find the perimeter of a rectangle is 2(length + width). What is the perimeter

Andrews [41]

Answer:

ok im not sure this is the right answer to your specific question, because i dont understand the wording to well, but here...

for 1/7 and 1/2 it would be 2/7 and 1 (whole)

for 1 and 1/7 it would be 2(whole) and 2/7

for 1 and 2/7 it would be 2(whole) and 4/7

for 4/9 it would be 8/9 and x

and for 2/9 it would be 4/9 and x

sorry if thats not the question :)

EDIT: its the second one because

2*1/7= 2/7

and 1/2*2=1

3 0

3 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