1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
USPshnik [31]
3 years ago
9

Solve the system by substitution 5x+3y=8 3x+y=8

Mathematics
1 answer:
Yakvenalex [24]3 years ago
4 0
3x+y=8
y=8-3x

5x+3(8-3x)=8
5x+24-9x=8
-4x+24=8
-4x=-16
x=4

5x+3y=8
5(4)+3y=8
20+3y=8
3y=-12
Y=-4

5x+3y=8
5(4)+3(-4)=8
20+-12=8
8=8
You might be interested in
A rectangle with a perimeter of 19m^2+2m-10 and a width of m^2 write an expression for the lenght
expeople1 [14]

Answer:

8.5m^{2}+ m -5

Step-by-step explanation:

Since perimeter, P=19m^{2}+ 2m -10 and we know that P=2(l+w) then P=2(l+m^{2})=2l+2m^{2}

The length will be 2l=19m^{2}+ 2m -10-2m^{2}=17m^{2}+ 2m -10

Now l=8.5m^{2}+ m -5

6 0
3 years ago
Which expressions are equivalent to the one below? Check all that apply.<br> 3x
noname [10]

Answer:

F and C

Step-by-step explanation:

5 0
3 years ago
PLEASE HELP
Kamila [148]

Answer:

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Complete the statements about the key features of the graph of f(x) = x5 – 9x3. As x goes to negative infinity, f(x) goes to neg
Mars2501 [29]
The function is f(x)= x^{5} -9x ^{3}

1. let's factorize the expression x^{5} -9x ^{3}:

f(x)= x^{5} -9x ^{3}= x^{3} ( x^{2} -9)=x^{3}(x-3)(x+3)

the zeros of f(x) are the values of x which make f(x) = 0.

from the factorized form of the function, we see that the roots are:

-3, multiplicity 1
3, multiplicity 1
0, multiplicity 3

(the multiplicity of the roots is the power of each factor of f(x) )


2.  
The end behavior of f(x), whose term of largest degree is x^{5}, is the same as the end behavior of  x^{3}, which has a well known graph. Check the picture attached. 

(similarly the end behavior of an even degree polynomial, could be compared to the end behavior of x^{2})

so, like the graph of x^{3}, the graph of f(x)= x^{5} -9x ^{3} :

"As x goes to negative infinity, f(x) goes to negative infinity, and as x goes to positive infinity, f(x) goes to positive infinity. "

7 0
3 years ago
Read 2 more answers
Andrea had 32 problems to do for mathematics homework over a weekend. She did of the problems on Friday night, and on Saturday s
DedPeter [7]

none of she did what was left on saturday

4 0
3 years ago
Read 2 more answers
Other questions:
  • Please help me with this.
    13·1 answer
  • The equation of a circle is x2 + (y - 10)2 = 16.
    9·1 answer
  • Please help me with this question.
    11·1 answer
  • Which, if any, of the following would not generate a sphere?
    14·1 answer
  • Solve the following equation.
    7·1 answer
  • A water park sells 168 tickets. Each ticket costs $12. What is the total cost of the tickets sold?
    9·2 answers
  • Anyone know the answer to this
    10·2 answers
  • Solve the equatuon<br><br> x/2-(2/(x+1))=1<br><br> x=?
    14·1 answer
  • A Cinema has 240 seats. 144 seats were sold
    13·1 answer
  • Please help!!!!!!!!!!!!!!!!!!!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!