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SVEN [57.7K]
3 years ago
12

Can someone pls help me!!!

Mathematics
1 answer:
max2010maxim [7]3 years ago
4 0

Answer:

It will equally 2 because you need to change the 3 into a 9 because you can't add fractions without having the same common demometer

Step-by-step explanation:

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Which rule which allows us to change the sign of an exponent
ruslelena [56]

Answer:

Step-by-step explanation:          

                                                                                       1

Given x³, we can write the equivalent expression -----------

                                                                                    x^(-3)

                                                              1

Given y^(-4) we can rewrite this as  ----------

                                                             y^4

Here we're applying the "rule of negative exponents."

3 0
3 years ago
What are the values of x and y in the matrix equation below?
choli [55]

Answer : value of x and y in the matrix equation is:

x = -3

y = +4, -4

Step-by-step explanation :

The matrix expression is:

\left[\begin{array}{ccc}x+4\\y^2+1\end{array}\right]+\left[\begin{array}{ccc}-9x\\-17\end{array}\right]=\left[\begin{array}{ccc}28\\0\end{array}\right]

First we have to add left hand side matrix.

\left[\begin{array}{ccc}(x+4)+(-9x)\\(y^2+1)+(-17)\end{array}\right]=\left[\begin{array}{ccc}28\\0\end{array}\right]

Now we have to add left hand side terms.

\left[\begin{array}{ccc}x+4-9x\\y^2+1-17\end{array}\right]=\left[\begin{array}{ccc}28\\0\end{array}\right]

\left[\begin{array}{ccc}4-8x\\y^2-16\end{array}\right]=\left[\begin{array}{ccc}28\\0\end{array}\right]

Now we have to equating left hand side matrix to right hand matrix, we get:

\Rightarrow 4-8x=28\text{ and }y^2-16=0\\\\\Rightarrow 8x=4-28\text{ and }y^2=16\\\\\Rightarrow x=-3\text{ and }y=\pm 4

Therefore, the value of x and y in the matrix equation is -3 and +4, -4 respectively.

5 0
3 years ago
A diver went 25. 65 feet below the surface of the ocean and then 16.5 Think it further down here then rose 12.45 feet right and
Flauer [41]
-25.65 - 16.5 + 12.45 = -29.7......he is now at 29.7 ft below the surface
7 0
3 years ago
A cylinder has a volume of 72 cubic inches. What is the volume of a cone with the same height and radius as the cylinder? Show a
nexus9112 [7]

Answer:

24 cubic inches

Step-by-step explanation:

The formulas for the volume of a cylinder and cone are ...

volume of a cylinder = πr^2·h

volume of a cone = (1/3)πr^2·h

For the same radius and height, the cone has 1/3 the volume of the cylinder. Your cone's volume is ...

(1/3)·(72 cubic inches) = 24 cubic inches

3 0
3 years ago
Nadia and some friends went to a movie. Their total cost was $30.24 which included fasted of 2.24 write an algebraic expreeeion
alexgriva [62]

Answer:

You can put this solution

30.24 - 2.24 = $28 just tickets

 

$28/x = $/person

or

(30.24 - 2.24)/x

Step-by-step explanation:

6 0
3 years ago
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