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guajiro [1.7K]
3 years ago
7

What is the solution to this equation? -15x=90

Mathematics
2 answers:
nydimaria [60]3 years ago
5 0
The solution=90/-15=-6=D
likoan [24]3 years ago
5 0

-15x = 90

Divide by 15

-x = 6

x = -6

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You want to conduct a survey to find out what sport the students at your school prefer to play.
Lemur [1.5K]

Answer:

Yes it is biased, its not fair!

Step-by-step explanation:

If you ask 20 boys who are playing football what their favorite sport is, they would most likely say football. They playing football during their free time at school, so that is probably their favorite sport (why would you play football if you didn't enjoy doing so?).

I hope this helped and I hope its not too late! If you have any questions please ask :)

3 0
3 years ago
Evaluate the expression for x=5, y=-3 and z=7<br> (x2 – z) (22+5)
zepelin [54]

Answer:

81

Step-by-step explanation:

(Refer to image)

Plug in x and z and follow order of operations to simplify the expression

8 0
3 years ago
Given c=(2.4,0.45) and d = (7,-4) find the direction of 5c+4d
kakasveta [241]

Answer:

The direction of 5c + 4d is approximately 19.0° clockwise with

the positive part of x-axis

Step-by-step explanation:

* Lets talk about the direction of a vector

- If the vector is (x , y), then  

# Its magnitude is √(x² + y²)

# Its direction is tan^-1 (y/x)

- The direction is the angle between the positive part of x-axis and  

  the vector

* Lets solve the problem

∵ c = (2.4 , 0.45) and d = (7 , -4)

- To find 5c + 4d , multiply the two coordinates of c by 5 and the two

  coordinates of d by 4

# Multiply c by 5

∴ 5c = [5(2.4) , 5(0.45)]

∴ 5c = (12 , 2.25)

# Multiply d by 4

∴ 4d = [4(7) , 4(-4)]

∴ 4d = (28 , -16)

- Lets add 5c and 4d

∴ 5c + 4d = (12 , 2.25) + (28 , -16)  

∴ 5c + 4d = [(12 + 28) , (2.25 + -16)]

∴ 5c + 4d = (40 , -13.75)

- The vector is in the 4th quadrant because the x-coordinate is

 positive and the y-coordinate is negative

* Find the direction of 5c + 4d

∵ The direction is tan^-1 (y/x)

∴ The direction is tan^-1 (-13.75/40) = -18.97°

* The direction of 5c + 4d is approximately 19.0° clockwise with

 the positive part of x-axis

3 0
3 years ago
6 1/4 ft = how many yards
puteri [66]
2.083333 yards are in 6 1/4 feet


6 0
3 years ago
Read 2 more answers
EXPERT HELP: DON'T GUESS and SHOW YOU WORK
Tamiku [17]

Answer:

3

Step-by-step explanation:

the mean is 103, as a result you must find the distance.

from 100 to 103 is 3

from 194 to 103 is 1

from 107 to 103 is 4

Then find the mean again youll get 18/6 which is 3

3 0
2 years ago
Read 2 more answers
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