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abruzzese [7]
4 years ago
8

Answer ASAP John is thinking of a number. He gives the following 3 clues. ``My number has 125 as a factor. My number is a multip

le of 30. My number is between 800 and 2000.'' What is John's number?
Mathematics
1 answer:
miskamm [114]4 years ago
8 0

Answer:

1500

Step-by-step explanation:

List of multiples of 125 between 800 and 2000: 875,1000,1125,1250,1375,1500,1625,1750,1875,2000

Of those only 1500 is divisible by 30: 1500 / 30 = 50

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3 years ago
F(x)=ax+b/2 then f^-1 (x-1) =2x-5/2 find a and b​
krok68 [10]

From the given inverse function, we have

f^{-1}(x-1) = 2x - \dfrac52 \\\\ \implies f^{-1}(x) = f^{-1}((x+1)-1) = 2(x+1) - \dfrac52 = 2x-\dfrac12

By definition of inverse function,

f\left(f^{-1}(x)\right) = x

so that

f\left(2x-\dfrac12\right) = x

a\left(2x-\dfrac12\right) + \dfrac b2 = x

2ax - \dfrac a2 + \dfrac b2 = x

\implies\begin{cases}2a=1 \\\\ -\dfrac a2+\dfrac b2 = 0\end{cases}

\implies \boxed{a=\dfrac12}

\implies \dfrac b2 = \dfrac a2 \implies \boxed{b=\dfrac12}

8 0
2 years ago
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PIT_PIT [208]
The radius is 5mm and the diameter is 10mm
4 0
3 years ago
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Savatey [412]
The answer would be ~30~ because 2*2^3 = 2^4= 16 then 3*6=18 then 16+18-4=30

Hope this helps

Have a great day/night

Feel free to ask any questions
4 0
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Answer:

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Step-by-step explanation:

i took the test

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