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arlik [135]
3 years ago
5

if mean= 20 and sum of data =120 then calculate the total number of data. please solve this question i will mark you as Brainlis

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Mathematics
2 answers:
iVinArrow [24]3 years ago
8 0

Answer:

the answer is 6...

Step-by-step explanation:

divide

Lera25 [3.4K]3 years ago
3 0

Answer:

Just divide 120 by 20.

Step-by-step explanation:

The answer is 6

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cheddar cheese cost $4.25 per pound. Which equation best represents y the total cost of x pounds of chedder cheese?
Shtirlitz [24]
The answer to the question is y = $4.25x
7 0
3 years ago
Which values of x and y would make the following expression represent a real number? (4+5i)(x+yi)
algol [13]

Answer:

So x=4 and y=-5 would work.

Step-by-step explanation:

When you multiply complex conjugates, you get a real result.

Example:

(a+bi)(a-bi)=a^2-b^2i^2=a^2+b^2

I replace i^2 with -1 since i^2=-1.

a^2+b^2 is a real number (there is no imaginary part, no i).

So what is the conjugate of 4+5i?

4-5i

So x=4 and y=-5 would work.

A multiple of the complex conjugate would work as well.

(a+bi)(ca-cbi)

c(a+bi)(a-bi)

c(a^2-b^2i^2)

c(a^2+b^2)

This is still a real number; there is no imaginary part,no i.

5 0
3 years ago
Solve the system of equations using substitution. 3x + 2y = 7 y = –3x + 11
Ilia_Sergeevich [38]
The answer is letter c
3 0
3 years ago
Read 2 more answers
Help please
s2008m [1.1K]
Charlotte's speed in meters per second is 2.5 meters per second.
What I did:
9 k per hour= (9/60)=per minute
9/60=0.15=15 m/m
0.15/60=0.025
0.025=2.5 m/s.

That is why Charlotte's speed in meters is 2.5 m/s.
4 0
3 years ago
Read 2 more answers
Write a function to describe the following scenario.
yKpoI14uk [10]

Answer:

r=160-12m

Step-by-step explanation:

Heart rate will be represented by r, minutes will be represented by m.

Here's the equation I came up with:

r=160-12m

We can also rearrange it to look like a point-slope equation. Either way works, it's the same equation.

r=-12m+160

This works because her heart rate is decreasing by a constant value. The initial heart rate is like the y-intercept, while the amount that it decreases by is the slope.

I hope this helps!

6 0
3 years ago
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