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3 years ago

11

Tính thể tích V của khối chóp tứ giác đều S.ABCD có cạnh đáy bằng a, cạnh bên SA bằng 2a

1 answer:

Elena L [17]3 years ago

3 0

Answer:

The Last dog is about a teenage boy who wants to venture out of the dome an odd place he has never seen before. As he began to explore around he discovers the harmlessness of the unusual place. As he later comes across a dog found next to his dead mother mother'scorpse. deciding take the dog with him.

Step-by-step explanation:

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Point a is at -2,4 and point c is at 4,7. Find the coordinates of point b on ac such that the ratio is 1:3

Andrews [41]

We have been given that point a is at $(-2,4)$ and point c is at $(4,7)$ . We are asked to find the coordinates of point b on segment ac such that the ratio is 1:3.

We will use section formula to solve our given problem.

When point P divides a segment internally in the ratio m:n, the coordinates of point P would be:

$[x=\frac{mx_2+nx_1}{m+n}, y=\frac{my_2+ny_1}{m+n}]$

Let point $(-2,4)=(x_1,y_1)$ and point $(4,7)=(x_2,y_2)$ .

$[x=\frac{1(4)+3(-2)}{1+3}, y=\frac{1(7)+3(4)}{1+3}]$

$[x=\frac{4-6}{4}, y=\frac{7+12}{4}]$

$[x=\frac{-2}{4}, y=\frac{19}{4}]$

$[x=-0.5, y=4.75]$

Therefore, the coordinates of point 'b' would be $(-0.5,4.75)$ .

6 0

4 years ago

PLEASE HELP!! I'VE DONE SO MANY TRIES BUT MY BRAIN ISN'T WORKING GEORGNERBH **WILL MARK BRAINLIEST + 50 POINTS**

mr_godi [17]

0.07 - 2.69 = -2.62

X = -2.62

Explanation:

I’ve just done a lot of math

Hope this helps!

8 0

3 years ago

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One of the fastest recorded speeds of a cheetah is 26.8 m/s. Approximately, what is this speed in kilo meters per hour?

dangina [55]

96.48 kilometers per hour

3 0

4 years ago

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There are four movies showing at the theater, 2/5 of the people bought tickets for the comedy, 1/4 bought tickets for the horror

RUDIKE [14]

Given:

Number of people bought tickets for comedy = $\frac{2}{5}$

Number of people bought tickets for horror = $\frac{1}{4}$

Number of people bought tickets for kids movie = $\frac{3}{10}$

To find the number of people who bought tickets for the action movie.

Let us take,

Total number of tickets = 1

Now,

Total number of tickets for comedy, horror and kids movie are = $(\frac{2}{5} +\frac{1}{4} +\frac{3}{10} )$

So,

$(\frac{2}{5} +\frac{1}{4} +\frac{3}{10} )$

LCM of 5,4,10 = 20

= $\frac{8+5+6}{20}$

= $\frac{19}{20}$

Rest are action movie's tickets.

Therefore,

Number of action movie tickets = $1-\frac{19}{20}$

= $\frac{20-19}{20}$

= $\frac{1}{20}$

Hence,

The number of people who bought the tickets for action movie is $\frac{1}{20}$ .

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4 years ago

Devaughn's age is two times Sydney's age. The sum of their ages is 18. What is Sydney's age?

emmainna [20.7K]

Answer:

Sydney's Age is 6

Step-by-step explanation:

6 x 2 = 12

12 + 6 = 18

8 0

3 years ago

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