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Orlov [11]
3 years ago
11

Find the difference between the products of 2.5 and 7.5 and the sum of 2.75 and 9.55​

Mathematics
1 answer:
faust18 [17]3 years ago
5 0

Answer:

Step-by-step explanation:

The product of 2.5 and 7.5 is (2.5)(7.5)=(5/2)(15/2)=75/4=18.75.

The sum of 2.75 and 9.55 is 2.75+9.55=(2+9)+(0.75+0.55)=11+1.3=12.3.

The difference between these is 18.75-12.3=(18-12)+(0.75-0.3)=6+0.45=6.45.

So, the answer is \boxed{6.45} and we're done!

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Write an equation in standard form of a line that passes through (4, 2) and is parallel to y = - 3/4 * x - 5 .
Bingel [31]

Answer:

y=2x+y-int

Step-by-step explanation:

If the line is parallet to the defined by the given equation the slope of the unknown line is m=2.

Use this value of slope to calculate the y intercept. 2  = ( 2 - y-int)/4 - 0)

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3 years ago
Please answer this question now
alisha [4.7K]

Answer:

If it's not too late by now, the answer is 19.9 mm^{2}

3 0
3 years ago
A sleep time of 15.9 hours per day for a newborn baby is at the 10h percentile of the distribution of sleep times for all newbor
Nuetrik [128]

Answer:

option (D) 16.5

Step-by-step explanation:

Data provided:

Sleep time of , X = 15.9 is at the 10th percentile

Standard deviation, σ = 0.5  hour

also,

10th percentile of normal distribution is

Z = F⁻¹(0.10)

or

Z = - 1.28  (Using Standard Normal distribution)

Now,

\\Z=\frac{X-\mu}{\sigma}

or

X = μ + ( σ × Z )

or

μ = X - ( σ × Z )

on substituting the respective values, we get

μ = 15.9 - 0.5 × (-1.28)

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Hence, the correct answer is option (D) 16.5

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