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3 years ago

Solve 3x2- 2x -7 = 0

Mathematics

1 answer:

Gwar [14]3 years ago

8 0

Answer:

x=-2

do your box method and find what multiplies to C and adds to B

to check your answer substitute x with what x=

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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3 years ago

Read 2 more answers

Which expression represents the area of the base of the cone? A cone with diameter 12 inches, height 8 inches, and slant height

Wewaii [24]

Answer: (pi) (6 squared)

Step-by-step explanation:

Hi, the base area of a cone is a circle, so, to answer this question we have to apply the next formula:

Area of a circle: (pi) radius^2

The diameter (d) of a circle is equal to: 2 radius

So:

D = 2r

Replacing with the value given:

12 =2r

12/2=r

radius= 6 inches

Back with the Area formula:

A = (pi) 6^2

Feel free to ask for more if needed or if you did not understand something.

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4 years ago

For each function, y varies directly with x. Find each constant of variation. Then find the value of y when x=-0.3

Viktor [21]

Answer:

1- The constant of variation is $\frac{10}{3}$

2- The constant of variation is $\frac{4}{3}$

Explanation:

When two variables are in direct variation, this means that when one of them increases, the other increases and vice versa

A direct variation relation is represented as follows:

y = kx

where k is the constant of variation

Now, to get the constant of variation, all we have to do is substitute with the given x and y variables and solve for k

For the given problems:

1- $y = \frac{2}{3}\ when\ x=0.2$ 

Therefore:

$y = kx\\\\\frac{2}{3} = 0.2k\\\\ k = \frac{10}{3}$

2- $y = 4\ when\ x=3$ 

Therefore:

$y = kx\\ 4 = 3k\\ k = \frac{4}{3}$

Hope this helps :)

5 0

3 years ago