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2 years ago

What is the surface area? 7 in 6 in 3 in

Mathematics

2 answers:

liraira [26]2 years ago

8 0

Answer:

126

Step-by-step explanation:

jarptica [38.1K]2 years ago

4 0

Hello. I think you mean find the volume volume=3D shapes area=2D shapes.
The formula is lxwxh (length x width x hight)
That means 6x3x7
You do 6x3=18x7=126
Your answer is 126-

Hope I could help!
Have a good day

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The number of bacteria in a petri dish is 50,000 (on day 0) if the amount is doubling each day by when will the number of bacter

Drupady [299]

Answer:

f(x) = 50000*2^x
3 days

Step-by-step explanation:

Given:

Initial amount of bacteria = 50000
Growth rate = 2 times a day

Required equation:

f(x) = 50000*2^x

Solve for x:

400000 = 50000*2^x
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2 years ago

Find two positive numbers so that twice their sum equals their product and one number is 10 times the other number. Enter the sm

Softa [21]

Answer:

Step-by-step explanation:

We'll call the 2 numbers x and y. Starting with the last part of that first sentence "one number is 10 times the other number" can be written, in algebraic form:

y = 10x

Now on to the first statement about the numbers: "twice their sum" is 2(x + y) and "equals their product" is = xy. Putting that all together:

2(x + y) = xy and we know that y = 10x so

2(x + 10x) = x(10x) and

$2(11x)=10x^2$ and

$10x^2-22x=0$ and

x(10x - 22) = 0 so

x = 0 or 10x - 22 = 0 which makes

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7 0

2 years ago

Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.

jeka94

Answer:

$x=4+2\sqrt{3}$

$x=4-2\sqrt{3}$

Step-by-step explanation:

Completing the square

when $ax^2+bx+c=0$

Given equation:

$3x^2-24x+40=28$

Subtract 40 from both sides:

$\implies 3x^2-24x=-12$

Divide both sides by 3:

$\implies x^2-8x=-4$

Add the square of half the coefficient of $x$ to both sides:

$(\frac{b}{2})^2=(\frac{-8}{2})^2=16$

$\implies x^2-8x+16=-4+16$

Factor the left side and simplify the right side:

$\implies (x-4)^2=12$

Square root both sides:

$\implies x-4=\pm\sqrt{12}$

Add 4 to both sides and simplify the radical:

$\implies x=4\pm\sqrt{4 \cdot 3}$

$\implies x=4\pm\sqrt{4}\sqrt{3}$

$\implies x=4\pm2\sqrt{3}$

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1 year ago

How do you simplify this expression step by step using trigonometric identities?

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3 years ago

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xxMikexx [17]

Answer:

y = 2/3x

Step-by-step explanation:

3x + 2y = 6

2y = 6 - 3x

y = 3 - 3x/2 or y = - 3/2x + 3

- - - - - - - - - - - - - -
Then find the negative reciprocal of the slope of the original line.

y = 2/3x

7 0

2 years ago

What is the surface area? 7 in 6 in 3 in​

What is the surface area? 7 in 6 in 3 in