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Soloha48 [4]
3 years ago
11

What is the correct expansion of (3x-2)(2x^2+5)

Mathematics
2 answers:
Murljashka [212]3 years ago
7 0
Foil or whatever
just multiply

remember
(a-b)(c+d)=ac-bc+ad-bd
and
(ax^m)(bx^n)=(a)(x^m)(b)(x^n)=abx^{m+n}

so

(3x-2)(2x²+5)=
(3x)(2x²)+(-2)(2x²)+(3x)(5)+(-2)(5)=
6x³-4x²+15x-10
wolverine [178]3 years ago
6 0
3x*2x^2=6x^3
3x*5=15x
-2*2x^2=-4x^2
-2*5=-10
6x^3+15x-4x^2-10=
6x^3-4x^2+15x-10
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The average weight of 8 marbles is 3.5 g. What is the total weight of the marbles?
professor190 [17]

Answer:

Take 8÷3.5. So the answer is aprominently 2.29.

8 0
3 years ago
Caroline has a movie card worth $75 that her grandfather gave to her for her birthday. After seeing her first movie, the card’s
faust18 [17]

Answer:

f(m) = 75-8m

Step-by-step explanation:

She began with $75.  After the first movie, she had $67 remaining; this means she spent

75-67 = $8

After the second movie, she had $59 remaining; she spent

67-59 = $8

After the third movie, she had $51 remaining; she spent

59-51 = $8

Each movie costs $8.  Letting m represent the number of movies, this gives us 8m.

Since she is spending money, we subtract this from the original amount, $75; this gives us

f(m) = 75-8m

3 0
3 years ago
What is the value of -3(7+5)/3^2 +9(2)
MatroZZZ [7]

<em>answer = 14 \\ solution \\  \frac{ - 3(7 + 5)}{ {3}^{2} }  + 9(2) \\  =  \frac{ - 3 \times 12}{9}  + 18 \\  =  \frac{ - 36}{9}  + 18 \\  =   \frac{ - 36 + 18 \times 9}{9}  \\  =   \frac{ - 36 + 162}{9}  \\  = \frac{126}{9}  \\  = 14 \\ hope \: it \: helps \\ good \: luck \: on \: your \: assignment</em>

4 0
3 years ago
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Determine the value of the expression.
lutik1710 [3]

It's like simple math but the sign of the answer would be the opposite.

|−19−(−14)|

|−19 + 14|

|- 5|

|- 5| = 5

8 0
3 years ago
A student wants to report on the number of movies her friends watch each week. The collected data are below: 2 14 1 2 0 1 0 2 Wh
Sunny_sXe [5.5K]

The student's friend watch 1.5 movies every week.

Data provided to us {2, 14, 1, 2, 0, 1, 0, 2}.

Number of data values = 8

Sorted or rearranged data {0, 0, 1, 1, 2, 2, 2, 14}

Median of the data provided;

Median is the mid point value of the data provided to us, but as in this case there are 8 data provided (even number of data), we will take the average of the 2 mid values of the data.

Mid Values = 1 and 2

\bold{Median=\dfrac{1+2}{2} = 1.5}

Mean of the data provided;

Mean=\dfrac{Sum\ of\ all\ data\ values}{Number\ of\ data\ values} \\\\Mean= \dfrac{(0+0+1+1+2+2+2+14)}{8}\\\\Mean=2.75

As we know, The data values provided are 0, 1 and 2, and there is 14 as well in the data which is the maximum value in the data provided to us but the value is far from the other data values provided to us. Therefore, the data value 14 is considered to be an outlier.

An outlier is the maximum value that increases the mean, which makes it larger than it should be.

If we were to compute the mean without the outlier,

Mean=\dfrac{Sum\ of\ all\ data\ values}{Number\ of\ data\ values} \\\\Mean= \dfrac{(0+0+1+1+2+2+2)}{7}\\\\Mean=1.1428

Now, we have understood that the mean is sensitive to outlier can be easily manipulated. thus, mean is not the right option to go for in this case.

Therefore, the median value of 1.5 is the right option.

Hence, the student's friend watch 1.5 movies every week.

To know more visit:

brainly.com/question/1363341

3 0
2 years ago
Read 2 more answers
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