Mathematics, 19.10.2019 08:30 ctyrector

1.which expression is not a polynomial ?
a. 4x-1 + 5x - 2
b. 1/3 x
c. x³ + 4x + 3
d. x - 5

2. which answer describe the polynomial ?
3x³ + 4x² - 7
a. quatric trinomial
b. cubic trinomial
c. quadratic trinomial
d. cubic binomial

3. which answer express the polynomial below in standard form ?
14x² - 8 + 5x - 6x² + 2x
a. 15x²- 8
b. 20x²+ 7x - 8
c. 8x² + 3x - 8
d. 8x² + 7x - 8

4. simplify
(4x²- 3x + 2) - (2x²+ 5x - 7)
a. 2x² -2x -5
b. 6x² + 2x -5
c. 2x² +2x -5
d. 2x² - 8x +9

Answers: 3

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Answers

Answer from: oreo543

1. A polynomial means it has more than one term.
a. has 4 terms
b. has 1 term (not a POLYnomial)
c. has 3 terms
d. has 2 terms
2. The first word in a polynomial description tells the degree (max amount of exponents) of the expression, and the second word tells how many terms it has.
a. This answer means it's maxed exponent is to the fourth power, which it's not. (WRONG)
b. This answer means that it has a max exponent to the third power, which is true, and it also says it has three terms, which is also true. (CORRECT)
3. You must combine like terms in this polynomial.
=> 14x^2 - 6x^2 =8x^2
=> 5x + 2x = 7x
=> -8
d. This answer combines all the terms correctly.
4. To simplify this equation, you must first distribute the negative to all of the second equation.
(4x^2 -3x+2) + (-2x^2-5x+7)
Now, combine like terms.
=>4x^2 - 2x^2 = 2x^2
=>-3x - 5x = -8x
=>2 + 7 = 9
d. This answer simplifies it correctly

Answer from: Quest

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

$4/2 = 2\\7/3.5=2\\8/4=2\\10/5=2$

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

$y=\frac{x}{2}$

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.

Answer from: Quest

X=14 hope it !

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You know the right answer?

1.which expression is not a polynomial ?
a. 4x-1 + 5x - 2
b. 1/3 x
c. x³ + 4x + 3

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