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3 years ago

Identify and explain the error.

Mathematics

1 answer:

sergeinik [125]3 years ago

8 0

Answer:

Step-by-step explanation:

Strictly speaking, 15% isn't precisely the same as 0.15; 0.15 is the decimal fraction used to calculate 15% of some quantity.

15% of 52 is indeed 7.8. $7.80 is the discount that is to be SUBTRACTED from the regular price ($52). Adding $7.80 to $52 is incorrect.

Also, 52 + 7.8 - 59.8 is incorrect: it's not an equation (but should be one), and we should be subtracting $7.80 from $52.

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Which expression is equivalent to 7 3/4 - 1/2

vagabundo [1.1K]

Answer:

Step-by-step explanation:

7.25 i think?

5 0

3 years ago

Find the percent of change from 74 hours to 85 hours.

Anna35 [415]

Answer:

The answer would be 14.8645, but it'd be repeating, so it's actually 14.864864864864865.

I think you should write the entire number down just in case.

I'm so sorry. It would be a percent increase, so it's a positive.

5 0

3 years ago

Slope of the line shown below

telo118 [61]

Answer:the slope would be 7/3

Step-by-step explanation:

This is because you write the slope in rise over run form and use the two points provided to get 14/6 and reduce hat number down to 7/3.

5 0

3 years ago

The atmospheric pressure p on a balloon or an aircraft decreases with increasing height. This pressure, measured in milimeters o

Bad White [126]

Answer:

$h = 3544.83km$

Step-by-step explanation:

Given

$P= 760 - 0.145h$

Required

Find h when P = 246

Substitute 246 for P

$246= 760 - 0.145h$

Collect like terms

$246- 760 = - 0.145h$

$-514= - 0.145h$

Make h the subject

$h = \frac{-514}{-0.145}$

$h = 3544.83km$

6 0

3 years ago

Given that c = 2πr<br>a. find c when π= 3.142 and r=50<br>b.find r when c=286 and π=31/7

Aleks04 [339]

Step-by-step explanation:

a.c=2πr

c=2x3.142x50

c=100x3.142

c=0.03142

b.c=2πr

286=2x31/7xr

286=62r/7

286x7=62r

2002=62r

2002/62=r

32.3=r

r=32.3

6 0

4 years ago