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storchak [24]
3 years ago
6

What percent of 84 is 21

Mathematics
1 answer:
Yuri [45]3 years ago
7 0
84x/21 21/84x=1/4=0.25=25% first you have to divide 21 into 84 and get 0.25 you then move the dot to the right to the 5 and then you put the percent next to the 5
The answer is 25%
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If f(x) = square root of x+3, what is the equation for f–1(x)? f–1(x) = x2 - 3 f–1(x) = x2 + 3 f–1(x) = (x - 3) 2 f–1(x) = (x +
cupoosta [38]

Answer:

\Large \boxed{\sf \ \ f^{-1}(x)=x^2-3 \ \ }

Step-by-step explanation:

Hello,

\text{For }x+3\geq 0\\\\f(x)=\sqrt{x+3}\\\\x=(fof^{-1})(x)=f(f^{-1}(x))=\sqrt{f^{-1}(x)+3}\\\\\text{*** take the square ***}\\\\f^{-1}(x)+3=x^2\\\\\text{*** subtract 3 from both sides ***}\\\\\large \boxed{\sf \ \ f^{-1}(x)=x^2-3 \ \ }\\

Hope this helps.

Do not hesitate if you need further explanation.

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What does a residual value of –4.5 mean in reference to the line of best fit?
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Answer:

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Step-by-step explanation:

The residual value is the difference between the observed value (from the scatter plot) and the predicted value (from the line of best fit).

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Step-by-step explanation:

Since integral from 1 to 4 of f(x) =10

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Let U = 2x, dU = 2dx, dx = dU/2

Evaluate the limit, upper limit gives dU = 2*4 = 8, lower limit gives dU = 2*1 = 2.

Since this limit are the same as the limit for the question,

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2 years ago
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