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BigorU [14]
3 years ago
13

A scale has a percent error of 7%. The scale reads the mass of a book as 450g. Which statement describes what the actual mass of

the book could be
Mathematics
1 answer:
ozzi3 years ago
5 0

Answer:

The actual mass of the book is between  481 . 5 g and 418 . 5 g.

Step-by-step explanation:

The mass of the book on the scale = 450 g

The percentage error in the scale = 7%

So, the actual mass of the book is 450 g ± 7%

Now, 7 % of  the mass 450 g = \frac{7}{100}  \times 450 = 31.5

⇒ 7% of 450 g = 31.5 g

Now, the Actual mass of the book =  450 g ± 31.5 g

450 g + 31.5 g   = 481 . 5 g

450 g - 31.5 g    = 418 . 5 g

Hence the actual mass of the book is between  481 . 5 g and 418 . 5 g.

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Which algebraic expression represents the phrase “two times the quantity of a number minus 12”?
Yakvenalex [24]

Answer:

The algebraic expression which represents the phrase “two times the quantity of a number minus 12” is : 2x- 12

Step-by-step explanation:

Algebraic expressions are the idea of expressing numbers using letters or alphabets without specifying their actual values. The basics of algebra taught us how to express an unknown value using letters such as x, y, z, etc. These letters are called here as variables. An algebraic expression can be a combination of both variables and constants. Any value that is placed before and multiplied by a variable is a coefficient.

for example :-

3x + 4y – 7,  4x – 10, etc.

These expressions are represented with the help of unknown variables, constants and coefficients. The combination of these three (as terms) is said to be an expression. It is to be noted that, unlike the algebraic equation, an algebraic expression has no sides or equal to sign

let the quantity mentioned in the question be 'x'

therefore according to the statement the algebraic expression which represents the phrase “two times the quantity of a number minus 12” is : 2x- 12 is

⇒2x - 12 (answer)

more on algebraic expression at

brainly.com/question/20660076

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1 year ago
I need help on number 9
lisov135 [29]

Complement angles, sum is equal 90

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Answer

Complement of angle with the measure of 70 degrees is 20 degrees

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If the mean, median and mode of a distribution are 5, 6, 7 respectively, then the distribution is:
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Paisley's car used 11 gallons to travel 374 miles. How many gallons of gas would she need to travel 442 miles?
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Step-by-step explanation:

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The University of Central Florida is planning to build a new access ramp for wheelchairs at its education building. The main ent
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Answer:

0.6 feet

Step-by-step explanation:

We solve this question using the Trigonometric function of Tangent.

tan θ = Opposite/Adjacent.

Where:

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Adjacent = Distance from the base of the ramp = 4 feet

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tan 8.1° = x/4

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