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Zigmanuir [339]
2 years ago
9

5. A contractor estimates that he will need 18 sheets of drywall, he actually

Mathematics
1 answer:
lubasha [3.4K]2 years ago
7 0

Answer:

Percent error is approx. 22%

Step-by-step explanation:

So to do this you need to know the formula for percent error, which is

percent error = l measured - theoretical / theoretical l * 100%

With this just plug in 18 (real) and 14 (measured).

percent error = l 14 - 18 / 18 l * 100%

percent error = l -4 / 18 l *100%

percent error = l -2/9 l *100%

You then do absolute value because the percent error must be positive not negative! So -2/9 becomes 2/9. You then divide 2/9 to get approx. 0.22... and you muliply by 100% to get 22%.

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Find the annual infiltration rate for the nearest 10th of a percent of a gallon of milk that increases the value from $1.51 to $
Leno4ka [110]

Answer:

7.429 cents

Step-by-step explanation:

Given that:

Price change = $1.51 to $2.03

Period of time = 7 years

Therefore, the annual inflation rate :

Difference in price / number of years

($2.03 - $1.51) / 7

$0.52 / 7

= 0.0742857 per year

= 0.0742857 * 100 (about 7.429 cents per year)

5 0
2 years ago
Which Which expression is equivalent to the 1 below
aleksandr82 [10.1K]

Answer:

B

Step-by-step explanation:

(2^6*9^6):18^14

18^6:18^14

18^-8

1:18^8

5 0
3 years ago
The formula for the area of a parallelogram is A = bh, where b is the base and h is the height. A parallelogram that is not draw
Ksivusya [100]

The simplified expression for the area of the parallelogram is A = 2x³ - 8x² - 6x + 24

The base of the parallelogram is represented by b

b = (x - 4)

The height of the parallelogram is represented by h

h = (2 {x}^{2}  - 6)

The area of the parallelogram is represented by A

A = bh

A = (x - 4)(2x²- 6)

A = 2x³ - 6x - 8x² + 24

A = 2x³ - 8x² - 6x + 24

The simplified expression for the area of the parallelogram is A = 2x³ - 8x² - 6x + 24

Learn more here: brainly.com/question/25601035

7 0
2 years ago
Chapter 7: Right Triangle Relationships and
Ipatiy [6.2K]

Answer:

the square of greater side is equal to the sum of two other side in right angled rectangle

Step-by-step explanation:

also known as trigonometry of Pythagoras.

5 0
2 years ago
Each of the following correctly match an English phrase with a mathematical expression
pshichka [43]
Each of the following correctly match an English phrase with a mathematical expression except _____. 


<span>A) a number times seven, 7x </span>
<span>B) a number subtracted from seven, 7 - x </span>
<span>C) the sum of a number and seven, 7 + x </span>
<span>D) a number divided by 7, 7/x 

if this is ur question...answer is D...should be x/7</span>
4 0
2 years ago
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