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3 years ago

I don’t understand. Need help:/

Mathematics

2 answers:

miv72 [106K]3 years ago

7 0

124.71 i’m pretty sure cause 60 is on both sides

Sidana [21]3 years ago

7 0

Answer:

62.35

Step-by-step explanation:

Triangle ABC is an isosceles triangle. That means Side CA equals Side CB.

Drawing an altitude line from point A, it divides Side CB into halves. 1/2 of 12 = 6. (Let's call that point M)

Side AM^2 = AC^2 - CM^2

---------------------> 12^2 - 6^2 = 144 -36 = 108

AM = $\sqrt{108}$ = 6 $\sqrt{3}$

To find the area: CB * AM * 1/2

---------------------> 12 * 6 $\sqrt{3}$ * 1/2 = 36 $\sqrt{3}$

36 $\sqrt{3}$ as a decimal is approximately 62.35

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PLEASE HELP I HAVE NO IDEA WHAT IM DOING!!!

algol13

Answer: 28.26

Step-by-step explanation:

What your looking for is called the annulus (or the difference of two concentric circles). You can find the annulus by subtracting the area of the inner circle from the area of the outer circle. Volume of a circle= πr²

You are given the diameter in these problems, so you need radius.

For the first circle (8 in one) :

8/2=4 r=4

A=3.14(4)²

A=50.24

For the second one (10 in one) :

10/2=5 r=5

A=3.14(5)²

A=78.5

To find the measure of the annulus, you subtract those numbers, getting 28.26

8 0

4 years ago

The perimeters of the square and the triangle shown below are equal. What is the value of x?

Rudiy27

Perimeter is the sum of all the sides. So we can set up an equation:

$\sf 3x+1+3x+1+3x+1+3x+1=2x+8+x+8+4x+2$

Now solve for 'x', combine like terms:

When it comes to terms with variables it's just like normal addition but we keep the variable:

$\sf 3x+3x+3x+3x=12x$
$\sf 2x+x+4x=7x$

So we have:

$\sf 12x+1+1+1+1=7x+8+8+2$

Add:

$\sf 12x+4=7x+18$

Subtract 7x to both sides:

$\sf 5x+4=18$

Subtract 4 to both sides:

$\sf 5x=14$

Divide 5 to both sides:

$\boxed{\sf x=2.8}$

8 0

4 years ago

What should the rule be for the table?

Law Incorporation [45]

Answer: it’s A

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

20 POINTS WILL GIVE BRAINLIEST HELP QUICKLY!!

SVETLANKA909090 [29]

Answer:

1.function 1 has a greater rate of change than function 2

3. Function 1 has a greater y-intercept than function 2

Step-by-step explanation:

Using the table we can find the slope using

m = (y2-y1)/ (x2-x1)

m = (29-5)/ (8-0)

= 24/8

= 3

The rate of change for the table is 3

The y intercept is (0,5)

Using the graph (0,-1) and (2,0)

m = (y2-y1)/ (x2-x1)

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

= (0+1)/2

= 1/2

The y intercept is (0,-1)

Since 3>1/2 , function 1 has a greater rate of change than function 2

Since 5>-1, function 1 has a greater y-intercept than function 2

8 0

3 years ago

Read 2 more answers

In a randomly selected sample of 1169 men ages 35–44, the mean total cholesterol level was 210 milligrams per deciliter with a s

Aneli [31]

Answer:

The highest total cholesterol level a man in this 35–44 age group can have and be in the lowest 10% is 160.59 milligrams per deciliter.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 210, \sigma = 38.6$