3 years ago

3/4 of 4/5 = ?????????????????

Mathematics

1 answer:

Debora [2.8K]3 years ago

7 0

Answer:

Step-by-step explanation:

I hope it helps

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Answer: look at the picture

Step-by-step explanation: Hope this help :D

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3 years ago

I really need help i i put a picture up but this thing do´s not let me post it with out a question ?

kobusy [5.1K]

Answer:

Step-by-step explanation:

$y=-x^{2} -5x-6$

$y=-(x^2+5x+6)$

$y=-(x+3)(x+2)$

Set each factors equal to zero.

$(x+3)=0 , x=-3$

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2 years ago

How do you solve: 2(7-x)+4x=20

Angelina_Jolie [31]

First expand it
Next subtract 14 - 2x + 4x so it can be 14 + 2x
Next subtract 14 from both sides
Next subtract 20 - 14 so it can be 6
Then divide both sides by 2
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3 years ago

Round the number 2,787 to the nearest hundred

miskamm [114]

Answer:

2,800

Step-by-step explanation:

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3 years ago

A recent survey found that 7575% of all adults over 50 wear glasses for driving. In a random sample of 4040 adults over 50, wh

malfutka [58]

Answer:

Mean = 30

standard Deviation = 2.74

Step-by-step explanation:

Formula

mean = np

Standard Deviation = $\sqrt{npq}$

from the question = 40

P = 75% or 0.75

q = 1 - p = 1 - 75% or 1 - 0.75

To find mean

mean = 40 x 0.75

= 30

For Standard Deviation (SD)

Standard Deviation = $\sqrt{npq}$

= $\sqrt{40 X 0.75 X 0.25$

= $\sqrt{7.5}$

:. Standard Deviation = 2.74

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3 years ago