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ziro4ka [17]
3 years ago
6

Which expressions are polynomials? Select each correct answer.

Mathematics
2 answers:
Elanso [62]3 years ago
8 0
Only 20x^2+y and 20x^2 are polynomials.
Law Incorporation [45]3 years ago
7 0
Each of these is a polynomial.

A polynomial is the sum or difference of one or more monomials.  A monomial is a variable, a constant, or the product of variables and constants.  Each of these is a monomial, so it is a polynomial as well.
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In each of the following problems, choose the price per unit per oz. in blanks a. and b, and then select the best buy.
hichkok12 [17]
There are 16 oz in a pound
a) 1.92 / 16 = $0.12 per oz
b) 3.52 / (16 x 2) = $0.11 per oz
c) Meat 2 is the better buy since it is cheaper
8 0
3 years ago
Read 2 more answers
ABC is an eqilateral triangle with sides 10cm find the length of the prependicular from A to BC<br>​
il63 [147K]

All sides are equal in an equilateral triangle and the perpendicular bisects the side too.

so BC will be bisected and the segments be 5 each.

you can use Pythagoras theorem to find the altitude length, hypotenuse will be one side of the triangle.

5^2+h^2=10^2

$h^2=100-25=75$

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7 0
3 years ago
(50 points &amp; Will give brainliest)
sweet-ann [11.9K]

Answer:

x = 3 , y = 13

Step-by-step explanation:

Note that both equations is equal to y. Set the two equations equal to each other

y = 7x - 8; y = 5x - 2

7x - 8 = y = 5x - 2

7x - 8 = 5x - 2

Isolate the x. Subtract 5x and add 8 to both sides

7x (-5x) - 8 (+8) = 5x (-5x) - 2 (+8)

7x - 5x = -2 + 8

Simplify.

(7x - 5x) = (-2 + 8)

2x = 6

Isolate the x. Divide 2 from both sides

(2x)/2 = (6)/2

x = 6/2

x = 3

---------------------------------------------------------------------------------------------------

Plug in 3 for x in one of the equations.

y = 7x - 8

y = 7(3) - 8

Simplify. Remember to follow PEMDAS.

y = 7(3) - 8

y = 21 - 8

y = 13

---------------------------------------------------------------------------------------------------

x = 3, y = 13 is your answer

~

4 0
3 years ago
What would be the final elevation if a moth is flying at at 9 meters above the ground and changes by -4?
quester [9]
5 because this is equivalent to 9-4 which is 5 meters, this is because he is going up 9 and then goes down 4, do 9-4, which is 5
6 0
2 years ago
Gabriella is x years old. Her sister, Felicia, is six years older than she is. Their mother is twice as old as Felicia. Their au
Yuri [45]
G = x
Felicia is Gabriella's age + 6
F = x + 6
Their mother is twice Felicia's age
M = 2(x + 6)  or  2x + 12
Tanya is the age of their mother plus Gabriella's age
A = 2x + 12 + x = 3x + 12
3x + 12
7 0
3 years ago
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