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Tanya [424]
4 years ago
11

Which distance formula shows a direct variation? 1. D=50t 2. D=16t^2 3. D= r×t

Mathematics
1 answer:
VLD [36.1K]4 years ago
7 0
The answer could be choice 1 or 3. 

With direct variation, we simply multiply one variable to get the other variable.

In #1, we are multiplying t by 50.

In #3, we are multiplying t by r.

In both cases, t is just be multiplied by a number.
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We know that

Part a) <span>Find the fifth term of the arithmetic sequence in which t1 = 3 and tn = tn-1 + 4
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Part b) </span><span>Find the tenth term of the arithmetic sequence in which t1 = 2 and t4 = -10

we know that 
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t4=-10
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find the value of d
d=[-10-2]/(4-1)-----> d=-12/3----> d=-4
find the </span>tenth term (t10)
t10=t1+(10-1)*(-4)----> t10=2+9*(-4)----> t10=-34

the answer Part b) is -34

Part c) <span>Find the fifth term of the geometric sequence in which t1 = 3 and tn = 2tn-1
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t4=2*t3-----> 2*12---> 24
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the answer Part c) is 48</span>
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