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QveST [7]
3 years ago
9

What is the coefficient of a3 after simplifying this expression? 2a3−10ab2+3a3−ab2−7

Mathematics
1 answer:
Sergio [31]3 years ago
7 0

Answer:

<h3>5</h3>

Step-by-step explanation:

Given the expression

2a^3−10ab^2+3a^3−ab^2−7

We are to find the coefficient of a^3

First is to collect the like terms;

2a^3−10ab^2+3a^3−ab^2−7

= 2a^3+3a^3−10ab^2−ab^2−7

= 5a^3-11ab^2-7

From the resulting equation, you can see that the coefficient of the term having a^3 is 5

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If I have a 62% in a class, what percentage do I need to get on a 50% weighted test grade to have at least a 70% in the class?
Nastasia [14]

Answer:

78%

Step-by-step explanation:

70 = 0.50 (62) + 0.50 (x)

70 = 31 + 0.5x

39 = 0.5x

x = 78

You must get at least a 78% on the test to have at least 70% in the class.

3 0
3 years ago
A bag contains 4 black tiles, 5 white tiles, and 6 blue tiles. Event A is
Murljashka [212]

Answer:

2/21

Step-by-step explanation:

The question is badly formatted so cannot match the answer choice

Total number of tiles = 4 + 5 + 6 = 15

P(A) = P(drawing a black tile from 15 tiles) = 4/15

After event A, there are 14 tiles left : 3 black, + 5 white + 6 blue

P(B/A) = P(drawing white tile after a black tile has been drawn) = 5/14

P(A and B) = P(A).P(B/A) = 4/15 x 5/14 = 2/21

Note that P(B) = 5/15 since we are talking about independently drawing a white tile from the original stack of tiles

6 0
1 year ago
Dentify all the pairs of vertical angles in the figure.<br><br> Pair#1:<br><br> Pair#2
Brilliant_brown [7]
Ok so the only ones that we know for sure are 4 = 1, 6=8, 7=9 and you can’t really do all that much with 2,3,5 because it’s not as obvious
3 0
3 years ago
Write the absolute value equation given the transformations
Evgesh-ka [11]

Answer:

<em>y = - 0.5 | x - 5 | + 2</em><em> </em>

Step-by-step explanation:

g(x) = |x|

1^{st} step - shifts right 5 units: g(x + 5) = | x <u><em>- 5</em></u> |

2^{nd} step - shifts up 2 units: g(x + 5) + 2 = | x - 5 | <u><em>+ 2</em></u>

3^{rd} step - reflected: - g(x + 5) + 2 =<em> - </em>| x - 5 | + 2

4^{th} step - stretched by 0.5: <em>y = - </em><u><em>0.5</em></u><em> | x - 5 | + 2</em>

<em>y = - 0.5 | x - 5 | + 2</em>

7 0
3 years ago
Ok I'm doing home work and need to show why 1/2 of 60 is not the same as 1/2 of 24 please help! It will give you 24 points.
Tems11 [23]
Simple,

1/2 of 60

re-write it as 0.5 of 60 aka 0.5*60

which is 0.5*60=30

Do the same with 1/2 of 24.

0.5 of 24

0.5*24=12.

Thus, it's not the same because they are different numbers and different number give you different answers.
7 0
3 years ago
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