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2 years ago

Cindy typed 200 words in 5 minutes. At this rate, how many words can she type in 25 minutes?

Mathematics

1 answer:

goldfiish [28.3K]2 years ago

8 0

If Cindy can type 200 words in 5 minutes, divide 200 by 5.
200/5=40, so 40x25=1000.

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consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i

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we have

$f(x)=x^{2} +2x-15$

we know that

The x-intercept is the value of x when the value of the function is equal to zero

in this problem

Find the roots of the function

equate the function to zero

$x^{2} +2x-15=0$

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$x^{2} +2x+1=15+1$

$x^{2} +2x+1=16$

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<u>the answer is</u>

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Goshia [24]

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Since 16 = 2⁴, then we can write:

f(x) =2⁽⁴ˣ⁾ and g(x) = 2⁽⁴ˣ/₂⁾ = 2²ˣ

for x = 1 f(x) = 2⁴ = 16
for x = 1 g(x) = 2² = 4
(√16 = 4)

for x = 2 f(x) = 2⁸ = 256
for x = 2 g(x) = 2⁴ =16
(√256) = 16

for x = 3 f(x) = 2¹² = 4096
for x = 1 g(x) = 2⁶ = 64
(√4096 = 64)

We notice that:
The output values of g(x) are the square root of the output values of f(x) for the same value of x.

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