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
cluponka [151]
3 years ago
11

(3x²+3x+5)+(7x²-9x=8)=10x²-12x=13

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
8 0

The value of x is equal to -5/6

To solve this question, we have to add two polynomials together. The polynomials are;

  • 3x^2+3x+5
  • 7x^2-9x=8
<h3>Addition of Polynomials</h3>

This involves adding of two or more different polynomials together. The polynomials adding together are or must be of the same degree. i.e x^2 must add to another coefficient of x^2 and x^3 adds to another coefficient of x^3 and so on.

In this given question, let's add the polynomials together.

(3x^2+3x+5) + (7x^2-9x = 8\)\\3x^2 + 7x^2 + 3x-9x+5-8 =10x^2-6x-3

Now, let's equate this with the last polynomial given

10x^2-6x-3=10x^2-12x-13\\10x^2-10x^2-6x+12x-3+13\\0+12x+10\\12x=-10

Let's solve for x

12x=-10\\x=-\frac{10}{12}\\x = -\frac{5}{6}

The value of x is equal to -5/6

Learn more on addition of polynomials here;

brainly.com/question/4142886

You might be interested in
Mandy and Pete have a biased spinner numbered 1, 2, 3, 4, 5. They each want to find an estimate for the probability that the spi
kotykmax [81]

Answer:

Pete

Step-by-step explanation:

Given that:

Mandy's Estimate :

Number of spins , n = 20

Pete's Estimate:

Number of spins, n = 200

A good probability estimate is one which has narrow margin of error with a high degree of confidence. These two variables are affected by sample size.

A high sample size give a narrower margin of error and increases the confidence level probability

Based on the sample size used by each of Pete and Mandy, we can conclude that, Pete's probability estimate would be better due to its significantly higher sample size.

5 0
3 years ago
Please help? ♡ (20 pts!)
Alja [10]
Answer is C. \frac{a ^{8} }{b^{10} }
First start by subtracting the exponents from top to bottom
let's start with a  so a^2 - a^-2     2 - (-2) = 4
Now B: b^-3 - b^2   so -3 - 2 = -5
This leaves you with a^4 b^-5
However you cannot have a negative exponent so B must cross over and move to the bottom to become positive
Don't forget about the squared outside the parentheses. Both exponents must be multiplied by two to get 8 and 10
\frac{a^{4 x 2} }{b^{5 x 2} }
4 0
3 years ago
Read 2 more answers
−5x+2y=9<br> y=7x<br> ​<br><br> solve the system of equation
egoroff_w [7]
Here to solve the equation we need to plug in the value y as given. -5x+2(7x)=9. -5x+14x=9. 9x=9. X=1.
6 0
3 years ago
(-3,10) and (-3,6) find the slope pleassseeee !!!
-BARSIC- [3]

Answer:

the slope is undeifined

hope this helps :)

5 0
3 years ago
Read 2 more answers
Can someone please help me ​
lukranit [14]

Answer:

B

Step-by-step explanation:

Since the function calls for you subtracting 1 from the input to the output, B makes sense.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Solve the system of equations. If the system is dependent, express solutions in terms of the parameter z.
    8·1 answer
  • What is the prime factorization for 40, 210 and 165? (finding the lcm)​
    6·2 answers
  • I have a right triangle. The hypotenuse is 12. The base is 7 and the other side is 9.7. The sin(x) is 0.014. Cos(x) is 0.99 and
    5·1 answer
  • A(n)= -5+ (n=1)(4)<br> I need help with this answer please
    6·2 answers
  • On a coordinate plane, a rectangle is shown with points S (4, negative 4), R (4, negative 10), Q (negative 7, negative 10), and
    12·2 answers
  • A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks.
    15·1 answer
  • HELP ME RNRNRN I WIll give brainlist
    5·1 answer
  • The initial balance in a savings account is $1,285. After which transactions will the final balance be the same as the initial b
    10·1 answer
  • A clock strikes 2:00.what time will their needles form a right angle?
    10·1 answer
  • (x-5)/(2) + (x-1)/(8) + (x-3)/(4) + (x-4)/(3) PLEAAAASEEEEEEEEEEEE HELPPPPPPPP THIS IS LIKE MY 5th time putting this UP PLEASE!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!