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3 years ago

2+5(8-5) what is solution

Mathematics

2 answers:

gtnhenbr [62]3 years ago

6 0

Answer:

Step-by-step explanation:

brackets: 8-5 = 3

Multiply: 5 * 3 = 15

Add: 2 + 17 = 19

Schach [20]3 years ago

4 0

I believe the answer is 17, using PEMDAS.

Starting of with the first thing in PEMDAS, the parentheses, 8-5 would equal 3.

Following that, the 3 would be multiplied by the 5, which equals 15.

Finally, the 2 would be added to the 15, which gives you 17.

I hope this helps !

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A helicopter flying 2,000 feet above the ground spots an airplane flying above. If the horizontal distance between the helicopte

soldi70 [24.7K]

Answer:

The answer- 1254ft

Step-by-step explanation:

You can do the calculator trick and get the answer and round to the tenth

8 0

3 years ago

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Find the dimensions of the closed rectangular box with maximum volume that can be inscribed in the unit sphere.

Anestetic [448]

Answer:

Step-by-step explanation:

Let the rectangle have (x,y,z) as vertex in positive octant. The rectangular box has to be necessarily symmetrical about all the three axes.

Then the sides of the box would be

$2x,2y,2z$

Volume = $8xyz$

Maximize volume subject to

$x^2+y^2+z^2 =1$

i.e. $g(x,y,z) = x^2+y^2+z^2 -1=0$

Use Lagrangian multipliers , we have

$∇f(x,y,z)=λ∇g(x,y,z)$ at the maximum

$∇f(x,y,z)=λ∇g(x,y,z) =(8yz,8xz,8xy)\\∇g(x,y,z)=(2x,2y,2z)$

$8yz=2λx8xz=2λy8xy=2λz$

Dividing we get

$\frac{y}{x} =\frac{x}{y} \\x^2=y^2$

Similarly $y^2=z^2$

Thus we get $3x^2 =1\\x = \frac{1}{\sqrt{3} }$

Hence dimensions are

(2x,2y,2z)

So dimensions are

$\frac{2}{\sqrt{3} } ,\frac{2}{\sqrt{3} } ,\frac{2}{\sqrt{3} } )$

3 0

3 years ago

4y = 42 - 3y Can you help me find y?

Lesechka [4]

4y = 42 - 3y

First, add '3y' to both of the sides.
$4y + 3y = 42$
Second, add '4y + 3y' to get '7y'.
$7y = 42$
Third, divide both sides by '7'.
$y = \frac{42}{7}$
Fourth, how many times does 7 go into 42? 42 ÷ 7 = '6'.
$y = 6$

Answer: y = 6

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3 years ago

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en el octagono regular siguiente cuyo lado mide 2 cm. se han trazado arcos de circunferencia de radio 1 en cada uno de los ángul

AnnZ [28]

Answer:

the answer is easy.

Step-by-step explanation:

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4 years ago

Rewrite the form In exponential form: Log100 = x

andrey2020 [161]

Answer:

$10^x=100$

Step-by-step explanation:

You know how subtraction is the opposite of addition and division is the opposite of multiplication? A logarithm is the opposite of an exponent. You know how you can rewrite the equation 3 + 2 = 5 as 5 - 3 = 2, or the equation 3 × 2 = 6 as 6 ÷ 3 = 2? This is really useful when one of those numbers on the left is unknown. 3 + _ = 8 can be rewritten as 8 - 3 = _, 4 × _ = 12 can be rewritten as 12 ÷ 4 = _. We get all our knowns on one side and our unknown by itself on the other, and the rest is computation.

We know that $3^2=9$ ; as a logarithm, the exponent gets moved to its own side of the equation, and we write the equation like this: $\log_3{9}=2$ , which you read as "the logarithm base 3 of 9 is 2." You could also read it as "the power you need to raise 3 to to get 9 is 2."

One historical quirk: because we use the decimal system, it's assumed that an expression like $\log1000$ uses base 10, and you'd interpret it as "What power do I raise 10 to to get 1000?"

The expression $\log100=x$ means "the power you need to raise 10 to to get 100 is x," or, rearranging: "10 to the x is equal to 100," which in symbols is $10^x=100$ .

(If we wanted to, we could also solve this: $10^2=100$ , so $\log100=2$ )

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3 years ago