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3 years ago

6x^2 + 3x - 1 =0 Use the Quadratic Formula to solve for X

1 answer:

Citrus2011 [14]3 years ago

7 0

The answer is :x=3±√3312x=3±3312x≈0.72871355,−0.22871355
Use the quadratic formula to find the solutions.−b±√b2−4(ac)2a-⁢b±b2-4⁢a⁢c2⁢aSubstitute the values a=6a=6, b=−3b=-3, and c=−1c=-1 into the quadratic formula and solve for xx.3±√(−3)2−4⋅(6⋅−1)2⋅63±-32-4⋅6⋅-12⋅6Simplify.Tap for less steps...Simplify the numerator.Tap for less steps...Raise −3-3 to the power of 22 to get 99.x=3±√9−4⋅(6⋅−1)2⋅6x=3±9-4⋅6⋅-12⋅6Multiply 66 by −1-1 to get −6-6.x=3±√9−4⋅−62⋅6x=3±9-4⋅-62⋅6Multiply −4-4 by −6-6 to get 2424.x=3±√9+242⋅6x=3±9+242⋅6Add 99 and 2424 to get 3333.x=3±√332⋅6x=3±332⋅6Simplify the denominator.Tap for less steps...Rewrite.x=3±√332⋅6x=3±332⋅6Multiply 22 by 66 to get 1212.x=3±√3312x=3±3312The result can be shown in both exact and approximate form.x=3±√3312x=3±3312x≈0.72871355,−0.22871355

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Anyone can help? Will give brainlist. I need this done before tomorrow :(

Nitella [24]

Answer:

A - 17.576

Step-by-step explanation:

All we have to do is replace s with 2.6!

V = s^3

v = 2.6^2

v = (2.6)(2.6)(2.6)

v = 6.76 * 2.6

v = 17.576

So, the volume of the cube is 17.576 feet! :)

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2 years ago

2) A circle has a radius of 8 cm. What is its circumference? 8 cm

egoroff_w [7]

Answer

16π cm ≈ 50.2655 cm

Step-by-step explanation

To find the circumference of a circle, we can use the equation C = 2πr.

C stands for the circumference while r stands for the radius. We can see that there is a proportional positive linear relationship between radius and circumference for all circles, and that to find circumference when we have a radius value, we multiply the radius value by 2π.

The value of π, also called pi, is a constant and is the ratio of a circle's circumference to its diameter (the diameter is twice the radius, hence the 2 in the equation). Note that π is a constant and applies to all circles because all circles are similar.

Since we know the value of r, or the radius, given as 8 cm in the question, we can plug this value into the equation C = 2πr from earlier.

C = 2πr (plug in 8 cm for the radius)

C = 2π * 8

C = 16π cm

Since the radius is in units of cm (centimeters), the circumference is also in units of cm (centimeters).

16π cm is the exact value of the circumference. However, if we want this circumference in decimal form, we would multiply 16 by the decimal form of π which is approximately 3.1416. Note that π actually has an infinite amount of decimals and that this 3.1416 is actually a rounded π value

C = 16π

C ≈ 16 * 3.1416

C ≈ 50.2655 cm rounded to four decimal places

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3 years ago

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Step-by-step explanation:

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3 years ago

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Caleb is preheating his oven before using it to bake. The initial temperature of the oven is 70° and the temperature will increa

gavmur [86]

Answer:

190 Degrees Celsius

Step-by-step explanation:

so first you multiply the

Rate per minute X Minutes

15 X 8 = 120

120 this is the temperature increase so you add this increase to the initial temperature which was 70 degrees Celsius

temperature Increase + Initial temperature

120 + 70 = 190 degrees Celsius

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3 years ago