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3 years ago

13

If f(x)=3/x-3, what is (f•f)(x)?

1 answer:

vladimir2022 [97]3 years ago

6 0

answer is B and it is the answer no questions asked hands down im the smartest person in the world

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Two gardeners can do the weekly yard maintenance in 8 minutes if they work together. The older gardener takes 12 minutes more th

weqwewe [10]

Answer:

Let x be the time taken( in minutes ) by younger gardener,

So, the one minute work of younger gardener = $\frac{1}{x}$

Also, the time taken by older gardener = (x+12) minutes ( given ),

So, the one minute work of older gardener = $\frac{1}{x+12}$

Total work done in one minute = $\frac{1}{x}+\frac{1}{x+12}$

Now, total time taken = 8 minutes,

Total work done in one minute = $\frac{1}{8}$

Thus,

$\frac{1}{x}+\frac{1}{x+12}=\frac{1}{8}$

$\frac{x+12+x}{x^2+12x}=\frac{1}{8}$

$\frac{2x+12}{x^2+12x}=\frac{1}{8}$

$16x + 96 = x^2+12x$

$x^2 -4x -96=0$

$x^2 - 12x + 8x - 96=0$

$x(x-12) + 8(x-12)=0$

$(x+8)(x-12)=0$

By zero product product property,

x + 8 =0 or x - 12 =0

⇒ x = -8 ( not possible ), x = 12

Hence, the time taken by younger gardener = 12 minutes,

And, the time taken by older gardener = 12 + 12 = 24 minutes.

6 0

3 years ago

Select all the values of k that shift f(x)=x^2 to the right when f(x)=(x-k)^2 PLEASE HELP

Brut [27]

Answer:

132, 560 and 210.

Step-by-step explanation:

We are given that,

The function $f(x)=x^{2}$ is translated right to where $f(x)=(x-k)^{2}$ .

Since, when a function is translated to the right, new function is of the form f(x-k).

So, according to the question, we have,

The value of 'k' must be positive.

Thus, the possible options are 132, 560 and 210.

8 0

4 years ago

Read 2 more answers

Help asap plz!! im doing this test rn and i don’t understand algebra

densk [106]

Answer:

I'm only answering so the guy above me can get brainliest

Step-by-step explanation:

6 0

3 years ago

....need help on this

Leona [35]

Answer:

ASA statement

Step-by-step explanation:

In quadrilateral ABCD, diagonal AC bisects $\angle BAD$ and $\angle BCD$ (given)

Next

$In\: \triangle ABC \: and \: \triangle ADC$

$\angle CAB\cong\angle CAD$

(By angle bisector property)

$AC\cong AC.... (common\: side)$

$\angle ACB\cong\angle ACD$

(By angle bisector property)

$\therefore \triangle ABC \cong \triangle ADC$

(By ASA Statement)

3 0

3 years ago

What is the intermediate step in the form (x+a)^2=b as a result of completing the square for the following equation? Please help

barxatty [35]

Answer:

${( \bold {\purple{ \boxed{ x + 7}}})}^{2} = \: \bold {\purple{ \boxed{ 9}}}$

Step-by-step explanation:

$- 2 {x}^{2} - 28x = 80 \\ \\ - 2( {x}^{2} + 14x) = 80 \\ \\ {x}^{2} + 14x = - 40 \\ \\ {x}^{2} + 2.x. \bold{ \red{7 }}+ 49 = - 40 + 49 \\ (add \: square \: of \: 7 \: both \: sides)\\ \\ {x}^{2} + 14x + {7}^{2} = 9 \\ \\ {( \bold {\purple{ \boxed{ x + 7}}})}^{2} = \: \bold {\purple{ \boxed{ 9}}}$

6 0

3 years ago