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zalisa [80]
3 years ago
13

Every year, roughly 25,000,000 kg of hair is cut in the United States. Each kilogram of hair contains about 0.0002 kg of zinc, a

nd each kilogram of zinc is worth about 4 dollars. How many dollars worth of zinc is contained in hair cut in the United States every year?
Mathematics
1 answer:
Nesterboy [21]3 years ago
4 0

$20,000

25,000,000 x 0.0002 = 5,000

5,000 x $4.00= $20,000

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3(7 - 9k) + 23k = 4k -- (24 - k)
Novay_Z [31]

Answer:

k=5

Step-by-step explanation:

remove parenthese, combine like terms, move terms, combine like terms, divide both sides

6 0
3 years ago
Can i get some help doing this plz
KATRIN_1 [288]

Answer:

The upper bound for the perimeter of the rectangle = 427.76 cm

Step-by-step explanation:

To obtain the upper bound for the perimeter, we need to first obtain the upper bound for the Length and Breadth of the rectangle.

Since, these dimensions were rounded to the nearest 1 decimal place, we can write down their ranges

Length = 127.3 cm

Width = 86.5 cm

Length can range from 127.25 cm to 127.34 cm

Breadth can range from 86.45 cm to 86.54 cm

The upper bound for the Length and Breadth of the rectangle are this 127.34 cm and 86.54 cm respectively.

Perimeter = 2 (L + B)

Upper bound of the perimeter

= 2 × (127.34 + 86.54)

= 2 × 213.88

= 427.76 cm

Hope this Helps!!!

5 0
3 years ago
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asambeis [7]

Answer:

a. 7

b. 5

c. 0

d. 2

Step-by-step explanation:

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5 0
3 years ago
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What are the solutions of the equation x2 +4x+4=25?
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The answer is :A. x=3 or x=-7
8 0
4 years ago
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Mr. miller has $25 in his savings and wants to put $10 every week into the account. write an equation showing how much money he
iris [78.8K]
The equation you write would be linear, and would be written in slope intercept form y=mx+b. Since Mr. Miller already has $25, we plug that in for "b" in the equation. We plug 10 in for "m", because "x" represents the number of weeks he has been saving. The equation would be y=10x+25. To find how much money Mr. Miller will have in 7 weeks, plug in 7 for x. y=10(7)+25 -> y=70+25 -> y=95 -> $95
7 0
3 years ago
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