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3 years ago

Express the surface area A of a cube in terms of its volume V

2 answers:

6 0

The surface area of a cube of side-length a is S = 6a" (six sides each of area a”) and the volume is V = a*. Thus, a=v1/3, so S = 6V2/3.

faust18 [17]3 years ago

3 0

S= 6a^2
V=a^3
Then a=v^1/3
So surface area=6(v)^2/3

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a quadratic equation has a discriminant of 12. which could be the equation? a.0 = –x2 8x 2 b.0 = 2x2 6x 3 c.0 = –x2 4x 1 d.0 = 4

Norma-Jean [14]

Answer:

Option b which is $2x^2+6x+3=0$

Step-by-step explanation:

We have been given the discriminant 12

We have to choose the equation which will satisfy the given discriminant.

We will consider all the given equation one by one

First we will take option a which is $-x^2+8x+2=0$

Discriminant from the equation we will find by the formula

$D=b^2-4ac$

Here, a=-1,b=8 and c=2 on substituting the values we will get

$D=8^2-4(-1)(2)=72$

Hence, option a is incorrect.

Now, we will consider option b which is $2x^2+6x+3=0$

Here, a=2,b=6 and c=3 on substituting the values we get

$D=(6)^2-4(2)(3)=12$

Hence, option b is correct

Therefore, option b is the required answer.

8 0

3 years ago

Read 2 more answers

timothy bought 12 of his cars to the babysitters. these toy cars represent 30% of his toy car collection. what is the total numb

omeli [17]

If 30% of his collection is 12 cars, then we can use the fraction

30/12=100/x

x=40

7 0

3 years ago

does the following represent a function that can be represented using the equation =+? how would do you know

scoray [572]

Answer: It's not a function because the line is curved, and it has an exponent in the equation which makes the line curved instead of straight which will make x repeat.

3 0

3 years ago

Find all solutions by factoring.<br> c? + 13c + 40 = 0

Karolina [17]

Answer: c = -5, -8

Step-by-step explanation:

c^2 +13c+40=0

(c+5)(c+8)=40

c = -5, -8

3 0

3 years ago

Sketch a line with a slope of -2 and another with a slope of -4

WINSTONCH [101]

Answer:

Step-by-step explanation:

Try and become familiar with a program like Desmos. It will do wonderful things for you.

I have graphed

Red: y = -2x + 5 (The 5 is the y intercept. For this question it could be anything.

Blue: y = - 4x + 5 Same note as above.

4 0

3 years ago