All categories

3 years ago

How do I do this? Anyone know please help

Mathematics

1 answer:

Zigmanuir [339]3 years ago

3 0

the two shapes are similar but scaled differently

this ratio is 2:3 (EF:AB)

so to find y we’ll set this up

2/3= y/4.5

and solve for y

4.5(2/3) = y

y = 9/3

y = 3

You might be interested in

The area of a rectangle is 50 units?.

Tju [1.3M]

Width is 25 units because 50/2 = 25

8 0

3 years ago

SampleVarianceandStandardError: You encounter a deck of Martian playing cards.There are 87 cards in the deck. You cannot read Ma

docker41 [41]

Answer:

(a) The standard error of estimate of the fraction of blue cards in the deck is 0.145.

(b) The sample size required is 84.

Step-by-step explanation:

The proportion of blue cards is, <em>p</em> = 0.30.

The number of times the cards were shuffled is, <em>n</em> = 10.

(a)

The standard error for sample proportion is given by:

$SE_{p}=\sqrt{\frac{p(1-p)}{n}}$

Compute the value of standard error as follows:

$SE_{p}=\sqrt{\frac{p(1-p)}{n}}\\=\sqrt{\frac{0.30\times (1-0.30)}{10}}\\=\sqrt{0.021}\\=0.145$

Thus, the standard error of estimate of the fraction of blue cards in the deck is 0.145.

(b)

Now we need to reduce the standard error.

The standard error is inversely proportional to the sample size.

If the sample size is increased then the standard error will be decreased.

So we need to use a larger sample size.

Compute the value of <em>n</em> for standard error 0.05 and <em>p</em> = 0.30 as follows:

$SE_{p}=\sqrt{\frac{p(1-p)}{n}}\\0.05=\sqrt{\frac{0.30(1-0.30)}{n}}\\0.05^{2}=\frac{0.21}{n}\\n=84$

Thus, the sample size required is 84.

4 0

4 years ago

Write the equation of a line in slope intercept form that has a slope of -2 and passes through the point (5,11).

VikaD [51]

Answer:

y = -2x + 21

Step-by-step explanation:

use point intercept form: y = mx + b where m is the slope and b is the y intercept

to find the y intercept, b, plug in values into equation and solve for b

11 = (-2) (5) + b

b = 21

then plug into the equation the slope and intercept!

3 0

3 years ago

When should you use slope intercept form

makkiz [27]

Answer:

If given the slope and a point, use the point-slope form.

If given the slope and the y-intercept, use the slope-intercept form.

4 0

3 years ago

Write an algebraic expression to match the graph<br><br> please help!

skelet666 [1.2K]

the graphed equation is:

y = -|x| + 1

<h3></h3><h3>How to find the algebraic expression that matches the graph?</h3>

On the graph, we can see an absolute value equation, which opens downwards, and passes through the points (1, 0) and (0,1).

The general absolute value equation is:

y = a*|x - b| + c

Because the vertex is at the point (0, 1), we know that:

b = 0, c = 1

Replacing that we get:

y = a*|x| + 1

Now, this must be zero when we evaluate in x = 1, then:

0 = a*|1| + 1

a = -1

Then the graphed equation is:

y = -|x| + 1

If you want to learn more about absolute value functions:

brainly.com/question/3381225

#SPJ1

4 0

2 years ago