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inysia [295]
3 years ago
6

How to i expand this ? x3 (3x - 5)

Mathematics
1 answer:
Nikitich [7]3 years ago
5 0
Use the distributive formula

a(b - c) = ab - ac

x^3(3x - 5) = \boxed{\bf{3x^4 - 5x^3}}
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If 2/3 of the distance from the y-axis to point A (−30, −45) is equal to 1/4 of the distance from the x-axis to point B(5a, 2a),
Aliun [14]

Answer:

The value of a is 80

Step-by-step explanation:

The distance of a point (x_o,y_0) from the y-axis can be written as d_y=|x_o|  because the x-coordinate of the y-axis is zero.

Similarly, the distance of a point  from the x-axis can be written as d_x=|y_0|

since the y-coordinate of the x-axis is zero.

In this problem:

- The distance of the point A (−30, −45) from the y-axis can be written as

d_A=|-30|=30

- The distance of point B (5a,2a) from the x-axis can be written as

d_B=|2a|=2a

Since a>0

We are told that 2/3 of the distance from the y-axis to point A (−30, −45) is equal to 1/4 of the distance from the x-axis to point B(a, a), which means

\frac{2}{3}d_A=\frac{1}{4}d_B

Therefore,

\frac{2}{3}(30)=\frac{1}{4}(2a)

And solving for a,

20=\frac{1}{2}a\\a=40

5 0
2 years ago
I need help on this question
dem82 [27]

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7 0
3 years ago
Y=5•(0)<br> Which graph represents the function<br> ?
Juli2301 [7.4K]
Answer:
The graph that represents the function should look like the image I attached. To graph the function simply multiply five by zero to find the value of y. Once you see that the value of y is zero graph the y-intercept at (0, 0). Finally, you draw a horizontal line from the y-intercept.

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3 years ago
In the following equation, what inverse operation would you need to use to solve for yy?
sweet-ann [11.9K]

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3 years ago
IF IT RIGHT YOU CAN GET 5,000 POINTS AND MARK which of the following pairs of numbers provide the best estimate of Which of the
Alik [6]

Answer:

The best is Option D, because the number 7.28 is between 7 and 8 which is a good estimate.

Step-by-step explanation:

Since the square root of 53 is:  7.28...

sqrt(36) = 6

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sqrt(81) = 9

sqrt(49) = 7

Option D would be the best estimate

Answer:  The best is Option D, because the number 7.28 is between 7 and 8 which is a good estimate.

8 0
3 years ago
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