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4 years ago

Graph Algebra Question .

Mathematics

1 answer:

postnew [5]4 years ago

7 0

Hello there! I believe that your best choice would be c. It is definitely not b or d since the larger the negative number, the less value it has. A includes numbers like -7,-8,-9, which are all less than -6. C is the only one that doesn't contain numbers such as -7,-8,-9 and includes negative numbers that are greater than -6, those of which are -5,-4,-3,-2,-1. Please tell me if this helped you with your homework!

(P.S brainliest would be appreciated.)

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HELP!!! 20 POINT REWARD!!!

d1i1m1o1n [39]

Ah! I love these questions!

To find the area of the shaded region, you must find the area of the circle. Then, you must find the area of the triangle inscribed in the circle. Lastly, you must subtract the area of the triangle from the area of the circle.

Area of Circle: $\pi$ x $r^{2}$
= $\pi$ x 10^2
= $\pi$ x 100
Usually these problems will not require you to convert pi into a decimal, but if it does, then the area of the circle would be 314.

Area of Equilateral Triangle: $\frac{ s^{2} \sqrt{3} }{4}$
To find the side, draw a perpendicular line from the center to a side of a triangle. This line will create two more triangles inside the big triangle. You will notice how in these smaller triangles, the angles are 30, 60, 90. From that we can deduce that half the length of a side is 5 $\sqrt{3}$ because of the 30, 60, 90 ratio. Multiply that by 2 to get 10 $\sqrt{3}$ as the length of the side of the large triangle. Now substitute this value into the formula above.
$\frac{ (10 \sqrt{3}) ^{2} x \sqrt{3} }{4} = \frac{300 \sqrt{3} }{4} = 75 \sqrt{3}$

Final Answer: 100 $\pi$ - 75 $\sqrt{3}$

6 0

3 years ago

Half of the students in an International School are Americans. One third of the remaining students are Europeans, and the rest a

Kazeer [188]

Answer:

450 students

Step-by-step explanation:

Let s = number of students

1/2 are Americans 1/2s are Americans

s -1/2s = number of students left

1/2 s = number of students left

1/3 of the students left are Europeans

1/3 (1/2s) = 1/6s are Europeans

The rest are Australians = 150

Students = Americans + Europeans + Australians

s = 1/2s + 1/6s + 150

Combine like terms

s = 1/2*3/3 *s + 1/6s +150

s = 3/6s + 1/6s +150

s = 4/6s + 150

Subtract 4/6s from each side

s -4/6s = 150

6/6s - 4/6s = 150

2/6s = 150

1/3s = 150

Multiply each side by 3

3* 1/3s = 150*3

s = 450

There are 450 students

3 0

3 years ago

Read 2 more answers

An SRS of 27 students at UH gave an average height of 5.6 feet and a standard deviation of 1 feet. Construct a 90% confidence in

andriy [413]

Answer: f) None of the above

= ( 5.283, 5.917)

Therefore at 90% confidence interval (a,b) = ( 5.283, 5.917)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 5.6ft

Standard deviation r = 1.0ft

Number of samples n = 27

Confidence interval = 90%

z(at 90% confidence) = 1.645

Substituting the values we have;

5.6+/-1.645(1.0/√27)

5.6+/-1.645(0.192)

5.6+/-0.317 ft

= ( 5.283, 5.917)

Therefore at 90% confidence interval (a,b) = ( 5.283, 5.917)

3 0

3 years ago

What single decimal multiplier would you use to decrease by 13% followed by a 6% decrease?

spayn [35]

Answer:

0.8178

Step-by-step explanation:

To make a 13% decrease in a value, we need to make the difference between the value (X) and 13% of the value:

X - 13% of X = X - 0.13*X = 0.87*X

To make a 6% decrease, following the same method, we just need to multiply the value by (1-0.06) = 0.94

So, to represent in a single decimal value a decrease of 13% and then a decrease of 6%, we just need to multiply the value by 0.87 and then by 0.94:

X*0.87*0.94 = X*0.8178

So the single decimal multiplier is 0.8178

8 0

3 years ago

To raise money for after-school programs at an elementary school, a group of parents is holding a weekend of games in a communit

frez [133]

Answer:

$8x-40y\geq 600$ and $x>0,y>0$

Step-by-step explanation:

The number of people is $x$ and the number of hours they are present in the space is $y$ .

Per person entry cost is $8.

Per hour cost of rent is $40.

They plan to earn a minimum of $600.

Donations by all the people entering the space is $8x$

Total cost of renting the space is $40y$ which will be subtracted from the total amount of donations.

The inequality that represents the situation is $8x-40y\geq 600$ and $x>0,y>0$ .

7 0

3 years ago