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Natalka [10]
3 years ago
14

8xy-3y^2+5x^2-7xy+12x^2-2y^2-3xy+8y^2

Mathematics
2 answers:
BabaBlast [244]3 years ago
6 0
 8xy-7xy-3xy-3y²-2y²+8y²+5x²+12x²
then simplify by combining like terms -2xy+3y²+17x²
vfiekz [6]3 years ago
5 0
Can combine like terms
remember yo an move terms around
like terms examples
x and 2x are like
3xy^2 and 4xy^2 are like
x and 2x^2 are not
3x^2y and 3xy are not


group like terms together

I like doing it in power order, highest to lowest

5x²+12x²-3y²-2y²+8y²+8xy-7xy-3xy=
(5x²+12x²)+(-3y²-2y²+8y²)+(8xy-7xy-3xy)=
(17x²)+(-3y²)+(-2xy)=
17x²-3y²-2xy
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A test is worth 100 points. The test is made up of 40 items. Each item is worth either 2 points or 3 points. Which matrix equati
lidiya [134]

Answer:

Total number of points in the test = 100

Total number of items in the test = 40

Let number of items of 2 points be x and number of items of 3 points be y.

Now, using the given information the situation can be represented by using the following equations :

⇒ x + y = 40 .........(1)

⇒ 2x + 3y = 100 .........(2)

The matrix equation is :

\begin{bmatrix}1 & 1\\ 2& 3\end{bmatrix}\cdot \begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}40\\ 100\end{bmatrix}

By solving the equation (1) and equation (2), we get :

Solution : x = 20 and y = 20

4 0
3 years ago
Read 2 more answers
Solve system of linear equation by substitution -x+y=2; 3x-5y=-4
GarryVolchara [31]

Answer:

(-3,-1)

Step-by-step explanation:

-x+y=2

3x-5y=-4

in the top equation, we can get y by itself on one side of the equation:

-x+y=2

y=x+2

now, since we know that y=x+2, in the bottom equation we can substitute x+2 for y (substitution method) and solve:

3x-5y=-4

3x-5(x+2)=-4

3x-5x-10=-4

-2x-10=-4

-2x=6

x=-3

since we now know that x=-3, we can use it to find y by plugging in -3 for x in the top equation (you can do it in either equation, but doing it in the top equation is easier):

y=x+2

y=-3+2

y=-1

answer: (-3, -1)

7 0
3 years ago
HELP ME PLEASE 30 points, HELP
mestny [16]

Answer:A

Step-by-step explanation:

When you translate you are simply moving the shape up, down, left right. You are not rotating it or chanding it's orientation.

7 0
2 years ago
Read 2 more answers
What is the value of p?<br><br> A) 55<br><br> B) 45<br><br> C) 35<br><br> D) 125
Margarita [4]

Answer:

35

Step-by-step explanation:

just subtract 125 and 99

7 0
3 years ago
According to the rational root theorem, what are all the potential rational roots of f(x)=5x^3-7x+11
Genrish500 [490]

Answer:

\pm11,\pm1,\pm\frac{11}{5},\pm\frac{1}{5}

Step-by-step explanation:

The given polynomial function is

f(x)=5x^3-7x+11

According to the Rational Roots Theorem, the ratio of all factors of the constant term expressed over the factors of the leading coefficient.

The potential rational roots are

\pm\frac{11}{1}=\pm11

\pm\frac{1}{1}=\pm1

\pm\frac{11}{5}

\pm\frac{1}{5}

4 0
3 years ago
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