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7nadin3 [17]
2 years ago
10

What are the solutions to the quadratic equation below?

Mathematics
1 answer:
Luden [163]2 years ago
5 0

Using factorization method;

x²+13x+40=0

x²+13+40

Find two numbers that you can add together to give the co-efficient of variable x. (I.e 13 for this question). Also, you'll find two numbers that you can multiply with each other to give you the whole number as an answer. (I.e 40 in this question). The two numbers must be the same (i.e the two numbers that will be added to give the co-efficient of x and the two numbers that will be multiplied to give the whole number must be the same two).

The two numbers are +5 and +8

The equation will therefore be = x²+5x+8x+40

You'll then factorize (I.e use a common factor of both values to bracket them)

x(x+5)+8(x+5)

(x+8)(x+5)

x is therefore (x+8=0) or (x+5=0)

x=(x=0-8) or (x=0-5)

x= -8 or x= -5

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What two numbers multiply to 10 and add to 9
sveta [45]
Did you mean -10? If so that is -1 and 10. 10 and 9 is not possible to answer.
-1+10=9
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8 0
3 years ago
The original price of a DVD is $12. The sale price is 75% off the original price. Find the sale price of the DVD.
lord [1]

Answer:

9 lol

Step-by-step explanation:

comming from a highscholer its 12% of 12 =9

hope this helps

7 0
2 years ago
Sammy had 30 minutes to do a three problem quiz. She spent 101/3 minutes on problem 1 and 54/5 minutes on problem 2. How much ti
den301095 [7]

He is left with 13\frac{13}{15} minutes for the last problem

Step-by-step explanation:

Given

Total time =  30 minutes

Time spent on problem 1: 10\frac{1}{3} minutes

Time spent on problem 2: 5\frac{4}{5} minutes

First of all, we will calculate the total time for 2 problems

Time\ for\ two\ problems = 10\frac{1}{3}+5\frac{4}{5}\\= \frac{31}{3} + \frac{29}{5}\\= \frac{155+87}{15}\\=\frac{242}{15}

The remaining time is:

Time\ for\ problem\ 3 = Total\ time - Time\ for\ two\ problems\\= 30 - \frac{242}{15}\\= \frac{450-242}{15}\\=\frac{208}{15}\\= 13\frac{13}{15}

Hence,

He is left with 13\frac{13}{15} minutes for the last problem

Keywords: Fractions, mixed fractions

Learn more about fractions at:

  • brainly.com/question/12973601
  • brainly.com/question/13063819

#LearnwithBrainly

7 0
3 years ago
So my teacher sucks at explaining this so I need someone's help to solve it.
galben [10]
So x is a variable which is just <span>character representing a number. We want to find x. To do this we want to get X by itself on one side of the equation. In this case/ we just need to divide both side by -4. Whatever you do to one side, you must do to the other. This gives us  X = -12. To check yourself just plug your answer back into the equation to see if its right. -4(-12) = 48. You have successfully solved for X.</span>
8 0
2 years ago
EASY MATH IF YOU CAN FIGURE IT OUT ILL GIVE YOU BRAINLEST AND THANKS AND THANKS TO ACCT AND 5 STAR RATINGS AND HELP U WITH ANY Q
Vikki [24]

Answer: b2 should be 5 i believe

Step-by-step explanation:

7 0
2 years ago
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