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3 years ago

Please I really need help I’m in a test right now plssss guys

Mathematics

1 answer:

laiz [17]3 years ago

6 0

Answer:

12x + 50

Y - intercept = 50

Slope = 12

Step-by-step explanation:

The y - intercept represents the original registrational fee even if you have never taken lessons.

The slope represents what you have to pay every time you take a lesson.

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the hu family goes out for lunch, and the price of the meal is $43. The sales tax on the meal is 6%, and the family also leaves

Anna007 [38]

Answer:

Step-by-step explanation:

43.00x.06=2.58

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3 years ago

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Dvinal [7]

Answer:

Step-by-step explanation:

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3 years ago

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3 years ago

Read 2 more answers

(X^4)-(45x^2)+324 what are the zeroes? And how many turning points?

dmitriy555 [2]

Zeroes:

We must solve

$x^4-45x^2+324=0$

To do so, we define the auxiliary variable $t=x^2$ . The equation becomes

$t^2-45t+324=0$

The quadratic formula yields the solutions

$t=9,\quad t=36$

Substituting back $t=x^2$ gives

$x^2=9 \iff x=\pm 3,\quad x^2=36 \iff x=\pm 6$

So, the zeroes are -6, -3, 3, 6.

Turning points:

Turning points are points where a function stops being increasing to become decreasing, or vice versa. Since functions are increasing when their first derivative is positive and decreasing when it's negative, turning points are points where the first derivative is zero.

We have

$f(x)=x^4-45x^2+324 \implies f'(x)=4x^3-90x$