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garri49 [273]
3 years ago
13

Can someone please explain this! (-5x^2+3)-(-x^3+9x^2+9)

Mathematics
1 answer:
Anastasy [175]3 years ago
5 0

9514 1404 393

Answer:

  x^3 -14x^2 -6

Step-by-step explanation:

Your expression is the difference of two polynomials. The parentheses can be removed by using the distributive property. The minus sign outside the second set of parentheses applies to each term inside parentheses.

  -5x^2 +3 +x^3 -9x^2 -9

Now, you can group like terms. In "standard form", the degrees of the terms decrease from left to right.

  x^3 +(-5x^2 -9x^2) +(3 -9)

And combine like terms.

  x^3 -14x^2 -6 . . . . . simplified form of the given expression

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What guides a researcher when deciding between using either linear, logistic, or Cox proportional hazards regression as an analy
castortr0y [4]

Answer:

The outcome variable type (continuous, binary, or time -to- event)

Explanation:

The outcome variable type is the type of variables involved in a research. The researcher would put the type of variable involved in his research into consideration in deciding what regression model to apply in his research. For example, if the type of variable in his research are continuous variables(continuous variables are variables that may be any value within a range and may be infinite), he would use linear regression

4 0
3 years ago
What is the area of a regular heptagon with side length of 6 meters and a distance from the to the vertex of 6 meters? round you
Ahat [919]
Apothem = side length / 2*tan(180 / number of sides)
apothem = side length / 2*tan (180 / 7)
apothem = 6 / (2*tan( <span> <span> <span> 25.7142857143</span></span></span>))
apothem = 6 / 2*0.48157
<span><span><span>apothem = 6.2296239384 </span> </span> </span>

Polygon area = (# of sides * side length * apothem) / 2
Polygon area = ( 7 * 6 * <span>6.2296239384) / 2
</span><span><span><span>Polygon area = 130.8221027064 </span> </span> </span> 



8 0
3 years ago
the tire on frank's bike moves 75 inches in one rotation. how many rotations will the tire have made after frank rides 50 feet
Orlov [11]


8 rotations

50 feet = 600 inches

600 inches divided by 75 inches = 8

7 0
3 years ago
Please help me idk this
Stells [14]
We are given that Donna knit a total of 12 blankets.

She took 4 months in doing it.

To find the number of blankets in 1 month, take ratio of number of blankets to number of months.

\frac{number \: of \: blnkets}{number \: of \: months}  \\  \\  =  \frac{12 \: blankets}{4 \: months}  \\  \\  =  \frac{3 \: blankets}{1 \: months}

Thus, she knit 3 blankets in 1 months
4 0
3 years ago
Read 2 more answers
HELP!!!! Divide. Write your answer in lowest terms as a proper or improper fraction (not a mixed number). 11/21 divided by 22/7
vodomira [7]
My answer is 1/6. Here's How I worked it out:

11/21 / 22/7 is the same as or = to 11/21 * 7/22 which = 77/462 and then divide both the numerator and denominator by 77 and you get 1/6. (In other words simplify 77/462). Hope this helped :) 
8 0
4 years ago
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