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k0ka [10]
3 years ago
10

Simplify (6x2 - 3 + 5x3) - (4x3 - 2x2 - 16​

Mathematics
1 answer:
Masteriza [31]3 years ago
8 0

Answer:

x^3 +8x^2 +13

Step-by-step explanation:

(6x^2 - 3 + 5x^3) - (4x^3 - 2x^2 - 16​)

Distribute the minus sign

6x^2 - 3 + 5x^3 -4x^3 + 2x^2 + 16​

Combine like terms

x^3 +8x^2 +13

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On the first 4 exams of his language class, Ishaan got an average score of 82. What does he need on the next exam to have an ove
dangina [55]

Ishaan to have a score of 97 on the next exam have an overall average of 85

What is the mean of exam scores?

The mean of exam scores is the sum of the scores divided by the number of exams taken, more like an average of all scores

Initially, average score on 4 exams is 82

average=total score/number of exams

average score on 4 exams=82

total score =unknown=assume it is

number of exams=4

82=x/4

x=4*82

x=328

In order to have an overall average score of 85, we would sum the total score of 4 exams and the fifth exam and divide by 5 exams

85=(328+y)/5

85*5=328+y

425=328+y

y=425-328

y=97

Find out more about average on:brainly.com/question/20118982

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8 0
1 year ago
When you multiply a pair of conjugates you get a real number
marusya05 [52]

Answer: The complex conjugate has a very special property. Consider what happens when we multiply a complex number by its complex conjugate. We find that the answer is a purely real number  it has no imaginary part. This always happens when a complex number is multiplied by its conjugate the result is real number.

Real numbers can be positive or negative, and include the number zero. They are called real numbers because they are not imaginary, which is a different system of numbers

Step-by-step explanation: Every complex number has a complex conjugate. The complex conjugate of a + bi is a - bi. For example, the conjugate of 3 + 15i is 3 - 15i, and the conjugate of 5 - 6i is 5 + 6i.

4 0
3 years ago
The price of an item has been reduced by $8.39 . The new sale price is $51.23. What was the original price?
Karolina [17]

Answer:59.62

Step-by-step explanation:

0riginal price=selling price+discount

=51.23+8.39

=59.62

6 0
3 years ago
Please Answer this! 65 + _____ − 15 = 65 <br><br><br>a −b +b = _____ C-D+D=_ Please explain too
yan [13]

Answer:

15

Step-by-step explanation:

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4 0
3 years ago
Evaluate the function <br><br>can someone please explain how I would solve this please?
ElenaW [278]
Y = 4 x 2^-6
y = 4 x 1/2^6
y = 4 x 1/64
y = 1/16
8 0
3 years ago
Read 2 more answers
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