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Veronika [31]
3 years ago
7

suppose a varies jointly with b and c and inversely with d and a=400 when b=16, c=5 and d=2. write the equation that models the

relationship. please show all steps
Mathematics
1 answer:
Studentka2010 [4]3 years ago
4 0
For this item, we represent first the proportionality constant by the variable k. Being directly proportional to both b and c, these variable will be in numerator and d will be in the denominator. That is,
                                  a = kbc / d
Substituting the known values,
                                 400 = k(16)(5) / (2) 
The value of k is 10. The equation that models the relationship is therefore,
                                   a = 10bc/d
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37.2 yards longer than the blue yarn

Step-by-step explanation:

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2 years ago
Question 4: *<br> What are the solutions to the equation 4x2 – 52x + 169 = 121?
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Answer:

1.0769

Step-by-step explanation:

multiply 4x2 to get 8

move -52x over the equal sign to make it 52x

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also move 121 over the equal sign to make it -121

Like this: 8 + 169 - 121 = 52x

Now when you simply, you will get 56 = 52x

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8 0
3 years ago
Second time posting this. Please help!! :)
Vedmedyk [2.9K]

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Step-by-step explanation:

\frac{480+24(x-40)}{x}

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5 0
3 years ago
3. Let sin 21 = 0.358. What is the value of x for cos x=0.358?
r-ruslan [8.4K]

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Step-by-step explanation:

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2 years ago
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