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3 years ago

What is 3n² = 243 I NEED THIS ANSWER QUICKLY!!!!

Mathematics

1 answer:

viva [34]3 years ago

8 0

Answer:

n=9

Step-by-step explanation:

You use reverse PEMDAS.

First you would divide by 3 on both sides. This should give you:

n²=81

Then you would find $\sqrt{81}$ . Which is 9.

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True or false: sec^-1(0.5) is undefined. explain your answer

ICE Princess25 [194]

Here we get the statement:

"sec^-1(0.5) is undefined"

And we want to see if this is true or false, so let's use the properties that we know to find that this is false.

Remember that the sec function is defined as:

$sec(x) = \frac{1}{cos(x)}$

Then we will have:

$sec^{-1}(x) = (\frac{1}{cos(x)})^{-1} = cos(x)$

Then is really trivial to see that:

$sec^{-1}(0.5) = cos(0.5) = 0.878$

Then we can conclude that the function is not undefined at 0.5, so the statement is false.

Below you can see the graph of the given function, and you will see that it is never undefined.

If you want to learn more, you can read:

brainly.com/question/16453813

6 0

3 years ago

Read 2 more answers

What is answer to -7b=-4

tensa zangetsu [6.8K]

$-7b=-4 \\\\ b=\frac{-4}{-7} \\\\ \boxed{b=\frac{4}{7}}$

3 0

3 years ago

Name a pair of fractions that use the least common denominator and are equivalent to 9/10 and 5/6

snow_tiger [21]

54/60, 50/60 Hope this helps!

4 0

3 years ago

What is the surface of the prism?

jasenka [17]

Given :-

Length :- 8m
Width :- 10
Height :- 10m

To find :-

Surface area

Solution :-

formula for Surface Area = 2(LW + WH + HL)

putting the known values,

Surface Area = 2(8×10 + 10×10 + 10×8) m²

Surface Area = 2(260) m²

Surface Area = 520m² ( Option C)

4 0

2 years ago

3x + y = 4 x + 2y = -2

dsp73

3x+y=4 (y=-3x+4)

Plug it in for y x+2(-3x+4)=-2
x=2

Plug in for x 2+2y=-2
y=-2

Solution: (2,-2)

7 0

3 years ago