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hoa [83]
3 years ago
15

3 PART QUESTION!

Mathematics
1 answer:
Illusion [34]3 years ago
5 0

Answer:

See below

Step-by-step explanation:

<u>Given relationship:</u>

  • d = rt

a) r = 3, d = 4

  • t = d/r = 4/3 h = 1 h 20 min

b) d = 4 miles, rate = r

  • t = 4/r, domain is r and must be greater than zero

c) d = 4 miles, time = t

  • r = d/t = 4/t, domain is t and it must be greater than zero

d) t = 3 h, rate = r

  • d = rt = 3r, domain is r and can be anything greater than zero
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What is the area of the Red Cross-section??? PLEASE HELP!!!!
alexandr1967 [171]
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y=mx+b, so now we must use two points to solve for the slope, or "m".

m=(y2-y1)/(x2-x1)

m=(0-15)/(5-0)

m=-15/5

m=-3  so our line so far is:

y=-3x+b, b=y-intercept=value of y when x=0, which we can see is 15 ft so:

y=-3x+15

Now the radius is x, so we must solve for x from the equation above...

-3x+15=y  subtract 15 from both sides

-3x=y-15  divide both sides by -3

x=(15-y)/3

And area of this circle is:

A=πx^2, and using x found above:

A=(π/9)(15-y)^2

A=(π/9)(225-30y+y^2), so when y=6 ft

A=(π/9)(225-30*6+6^2)

A=(π/9)(81)

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8 0
4 years ago
Solve the system. 9=4x-2y 2x+6=y
Digiron [165]

Step-by-step explanation:

4x-2y = 9 ...1

2x-y = -6 ...2

if ...2 × 2

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4 0
2 years ago
Can someone help me with this one
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In order to find an average, add all the numbers together, then divide by the amount of numbers.
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7 0
4 years ago
the label on the bottle of vitamin says that each capsule contain 0.5 grams. when check each capsule had 0.505 grams. was that t
Diano4ka-milaya [45]

Answer:

0.505 g is <em>more than</em> the advertised amount by 0.005 g.

Step-by-step explanation:

0.5 = 0.500, so 0.505 is <em>more than</em> the advertised amount.

"Too little" or "too much" is a judgment based on some criteria not specified by the problem statement. Usually a supplier will want to ensure the customer receives full measure, so will adjust the capsule-making machine to provide at least the advertised amount. Whether it is "too little" or "too much" depends on your point of view and the dangers or costs of deviating from the advertised amount.

0.505 - 0.500 = 0.005 . . . . the difference between the actual and advertised amounts, in grams.

8 0
4 years ago
Which expression is equivalent to this expression?<br> (-5cd-4)(2cd2)2
Vlad1618 [11]

Answer:

-20c^2 d^3 - 16cd^2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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