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3 years ago

Write a real world situation for the following equations:

1 answer:

3 0

2. Snap gym costs $120 for registration fee and $25 each month. Awesome gym costs $45 each month with no registration fee. After how many months will the cost of the two gyms be equal ? 3. Awesome video game has a total of 100 points. If you are out, you miss 6 points. Cool video game has a total of 160 points. If you are out, you miss 10 points. After how many times of getting out will you have the same number of points on both the games ?

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Inverse of f(x)= x^2 -1, x is greater than or equal to 0

romanna [79]

$f(x)=x^2-1,\ x\geq0\\\\y=x^2-1\\\\\text{replace x with y and y with x}\\\\x=y^2-1\\\\\text{solve for y}\\\\y^2-1=x\ \ \ \ |+1\\\\y^2=x+1\to y=\sqrt{x+1}\\\\Answer:\ \boxed{f^{-1}(x)=\sqrt{x+1}}$

3 0

4 years ago

Match the provided functions to a graphed function with the same zero(s).

satela [25.4K]

Answer:

1st:

${x}^{3} - 3 { x}^{2} - 3$

2nd:

${x}^{2} - 5x + 4$

3rd:

$- 4x - 8$

Step-by-step explanation:

Graph all of them and see which ones cross the x- axis at the same points.

8 0

3 years ago

My answer is wrong but i don’t know how

Nitella [24]

Answer:

Answer is B

Step-by-step explanation:

-1/5 is the answer.

If you need work just let me know

7 0

3 years ago

Please answer !!!!!!!!!

xxMikexx [17]

Answer:

answer is b

Step-by-step explanation:

look at the picture

3 0

4 years ago

Read 2 more answers

I need help now plz

Romashka-Z-Leto [24]

Answer:

Step-by-step explanation:

The picture is a bit blurry, but from what i can see, i'd say C (whichever one has -4 x 3 x 1 under the square root.)

So for this, you need to know the quadratic formula, which is:

$\frac{-b ± \sqrt{b^{2} -4ac} }{2a}$

*ignore the weird capital A, it keeps coming up when i try to use the ± symbol

They have given you the equation of a quadratic, so the first thing you have to do is rearrange it, so that $x^{2}$ comes first.

So now we have the equation: 3 $x^{2}$  - 2x +1

*the quadratic formula uses a, b and c, but they are specific. a is always the coefficient of $x^{2}$ , b is always the coefficient of x and c is always the constant (number without an x)

So, i can find that, in this case:

a = 3 b= -2 c=1

Now substitute each of those values it into the original quadratic equation:

$\frac{-(-2) ± \sqrt{(-2)^{2} -4(3)(1)} }{2(3)}$

*again, ignore the weird capital A.

That's how you find the answer, which from what i can tell in the picture is C.

Hope that helped : )

6 0

3 years ago