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3 years ago

Solving simple quadratic equations.

Mathematics

2 answers:

Schach [20]3 years ago

6 0

Answer:

1.) $x=4,-4$

2.) $x=5,-5$

Step-by-step explanation:

Remember to use square roots..

Umnica [9.8K]3 years ago

3 0

Answer:

x=5

Step-by-step explanation:

the square root of 25 is 5 and 5*5=25 so the answer is 5

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How do you write 9.6004 × 10^15 in standard form?

Naddik [55]

Answer:

9600400000000000 is in standard form

6 0

2 years ago

Please answer this correctly

Eva8 [605]

Answer:

Surface Area is 56π cm²

Step-by-step explanation:

The area for a cylinder's surface area is

a=2πrh+2πr²

The cylinder base's radius is 4 cm

The cylinder's height is 3 cm

Putting into the equation:

a=2×π×4×3+2×π×4²

a=2π×4×3+2×π×4²

a=8π×3+2×π×4²

a=24π+2×π×4²

a=24π+2×π×16

a=24π+2π×16

a=24π+32π

a=56π

The surface area of the cylinder is 56π cm².

5 0

3 years ago

PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!!!!!

aivan3 [116]

Hello and Good Morning/Afternoon

Let's take this problem step-by-step:

To find the solution to a system of equation

⇒ must set the equations equal to each other

⇒ and solve

Let's put that into action

$x^2-2x+3 = -2x + 12\\x^2-2x+2x+3-12=0\\x^2-9=0\\(x+3)(x-3)=0$

At this point, to make the whole thing equal zero

⇒ either 'x+3' or 'x-3' equals zero

⇒ must find 'x' that satisify either equation

$x-3=0\\x=3\\\\x+3=0\\x=-3$

Let's find the corresponding f(x) to each x-value

$f(3) = -2(3)+12=-6+12 = 6\\\\f(-3) = -2(-3) + 12=6+12=18$

Therefore the solutions are (3,6) and (-3,18)

Answer: (3,6), (-3,18)

Hope that helps!

#LearnwithBrainly

3 0

1 year ago

Please help

earnstyle [38]

Please consider the graph of the sphere.

We know that the volume of sphere is equal to $\frac{4}{3}\pi r^3$ , where r represents radius of sphere.

We can see that diameter of sphere is 30 inches. We know that radius is half the diameter, so radius of the given sphere would be half of 30 inches that is $\frac{30}{2}=15$ inches.

$V=\frac{4}{3}\pi r^3$

$V=\frac{4}{3}\pi (15\text{ in})^3$

$V=\frac{4}{3}\pi \times 3375\text{ in}^3$

$V=4\times 1125\pi \text{ in}^3$

$V=4500\pi \text{ in}^3$

Therefore, the volume of the given sphere is $4500\pi\text{ in}^3$ and option B is the correct choice.

8 0

3 years ago

Determine the equation of the inverse of y=-4/x+1 The inverse is y=-a/x-b where a = a0 and b = a1

leva [86]

y=-4/x+1 is ambiguous, since it's not immediately clear whether you meant

-4
y = -4/x + 1 or y = ---------
x+1

I'm going to assume that the latter is what you meant.

1. Interchange x and y, obtaining:

-4
x = --------
y+1

2. Solve this for y, obtaining y+1 = -4/x, or xy + x = -4, or

-x - 4
xy = -x-4, or y = ---------
x

-1 -1 4
3. Replace y with f (x): f (x) = -1 - -----
x

This last result has the correct form.

8 0

3 years ago

Read 2 more answers