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LekaFEV [45]
3 years ago
12

Please please help me

Mathematics
1 answer:
Semenov [28]3 years ago
5 0
X=3 because you subtract the three on both sides to get x alone. So you get: 7x=21 then you divide seven by 21 and get x=3
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Consider a circle centered at C(0,0). If the point P(3,5) lies on the circle, then which of the following points also lies on th
Zarrin [17]

Answer:

C

Step-by-step explanation:

First find the equation of the circle

the general formula for a circle (x-h)² + (y-k)² = r² where (h=0, k=0) are the coordinates of the center and r is the radius that we do not know

the distance between the center (0, 0) and the point (3,5) is the radius

distance formula d² = (x2-x1)² +(y2-y1)²  where (x1=0,y1=0) and (x2=3, y2=5)

d² = (3-0)² + (5-0)² = 3² +5² = 9+ 25 = 34 =r²

(x-0)² + (y-0)² = 34 ; x²+y² =34 is the equation of the circle

Second check if any of the points are on the circle by substituting x and y with de given coordinates.

A. for (-2, 6) we have (-2)²+6² =34 so 4+36 =34 false

B. for (6, -√5) we have 6²+(-√5)² =34 so 36+5=34 false

C. for (1, √33) we have 1²+(√33)² =34 so 1+33 =34 true

D. for (-2√2, 4) we have (-2√2)²+4² =34 so 8+16=34 false

8 0
3 years ago
Solve the inequality y−5(y+1)≥2y−5 and write the solution in interval notation.
morpeh [17]

Answer:

0≥6y

Step-by-step explanation:

y-5(y+1)≥2y-5

y-5y-5≥2y-5

-4y≥2y

0≥6y

5 0
3 years ago
What is the value of x?
serg [7]

Answer:

The horizontal value in a pair of coordinates: how far along the point is. The X Coordinate is always written first in an ordered pair of coordinates (x,y), such as (12,5). In this example, the value "12" is the X Coordinate. Also called "Abscissa" See: Coordinates.

3 0
3 years ago
Kahlil is recording a beat for a song that he is working on he wants the length of the beat to be more than 17 seconds long. His
Svet_ta [14]

In the problem, the length of the beat is take by variable T.

According to problem,

Kahlil wants, "the length of the beat to be more than 17 seconds long".

We took length of beat by variable T.

Therefore, the length of the beat to be more than 17 seconds long could be rephrase as

" T is more than 17".

And in inequality form we can write it as

T>17.

Now, Kahlil's friend told that "beat needs to be 9 seconds longer than that".

So, 17 longer than 9 is 17+9=26.

But as we can see that the beat should be longer than 17 but less than 26 (because 26 is the maximum length in seconds suggested by friend).

So, the final beat should be less than 26.

And we would setup an inequality as

T <  26.

Therefore, Correct option is option D) T < 26 ;  8, 6, 5.



5 0
3 years ago
If 6 kg of<br>biscut cost $27<br>Calculate the cost of<br>13kg of biscuits​
xxMikexx [17]
6kg cost 27
1kg cost 4.5

13kg X 4.5= 58.5
4 0
3 years ago
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