2 years ago

Please help meeeeeeee

Mathematics

1 answer:

lana66690 [7]2 years ago

8 0

Answer:its not loaxibf

Step-by-step explanation:

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the mean of marks scored by 100 students was found to be 40. Later on, it was discovered that a score of 53 was misread as 83. F

liberstina [14]

As the sum of marks of others remain unchanged , let their sum be x . As the mean using 83 was 40 , we have ,

(x +83)/100 = 40

x + 83 = 4000

x = 3917

Now mean using 53 ,

(x +53)/100

(3917+53)/100

39.7.

Hope it helps , plz mark as brainiest :-)

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2 years ago

Help me pls, here you are.

VLD [36.1K]

Answer:

The answer is -3/8

Step-by-step explanation:

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A fitness center currently has 320 members. Monthly membership fees are $45. The manager of the fitness center has determined th

Vladimir [108]

I thinks it’s a because it’s

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2 years ago

Solve for y y-(-5)=-7

romanna [79]

Y - (-5) = -7
---------------------------
Simplify
y + 5 = -7
-------------------------------------
Subtract 5 from each side
y + 5 - 5 = -7 - 5
y = -12
--------------------------------------------
y = -12 is your answer

7 0

2 years ago

Read 2 more answers

Find the focus and directrix of the parabola with the equation x² = -22y.

Bad White [126]

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Answer:

focus: (0, -5.5)

directrix: y = 5.5

Step-by-step explanation:

The equation compares to the form ...

x² = 4py

where 4p = -22 ⇒ p = -22/4 = -5.5.

The value of p is the distance from the vertex to the focus. The negative value means the focus is below the vertex at (0, -5.5).

The directrix is above the vertex by the same amount, so is y = 5.5.

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2 years ago