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3 years ago

How much alfalfa does Helmut need to add to 30L of ostrich pellets to make a feed mix that is 40% alfalfa by volume?

Mathematics

1 answer:

Nutka1998 [239]3 years ago

8 0

Answer:

a = 20 . . . . liters

Step-by-step explanation:

To solve this, multiply the equation by 30+a:

a = 0.4(30 +a)

a = 12 + 0.4a . . . . . eliminate parentheses

0.6a = 12 . . . . . . . . subtract 0.4a

a = 12/0.6 = 20 . . . divide by the coefficient of a

20 L of alfalfa must be added

_____

Check

20/(30+20) = 20/50 = 40/100 = 0.4 . . . . . . answer checks OK

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the length of rectangular desk is 4 times its width. if the desks perimeter is 30 what is the desks area????

Ulleksa [173]

4×3=12
12+12=24, 3+3=6
24+6=30

So 12 × 3 = 36 square ft.

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3 years ago

A box contains 10 balls, of which 3 are red, 2 are yellow, and 5 are blue. Five balls are randomly selected with replacement. Ca

VLD [36.1K]

Answer:

The required probability is 0.1.

Step-by-step explanation:

red balls = 3

yellow balls = 2

blue balls = 5

Selected balls = 5

Number of elemnets in sample space = 10 C 5 = 1260

Ways to choose 1 red ball and 4 other colours = (3 C 1 ) x (7 C 4) = 105

Ways to choose 5 balls of other colours = 7 C 5 = 21

So, the probability is

$\frac{105}{1260} + \frac {21}{1260}\\\\\frac{126}{1260}=0.1$

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3 years ago

Which equation shows the point-slope form of the line that passes through (3, 2) and has a slope of 1/3

Mnenie [13.5K]

Answer:

y-y1=m(x-x1)

y-2=1/3(x-3)

y=1/3x+1

3 0

3 years ago

31,680 ft = mi A. 6 B. 18 C. 60 D. 2,640

Vlad1618 [11]

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31,680 feet = x miles

31,680/5,280 = 6

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Your answer is A. 6.

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3 years ago

What is the y-intercept of the line?

Amanda [17]

Answer:

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Step-by-step explanation:

got this answer from (www.Math.com)

Glad I helped! =)

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3 years ago