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
docker41 [41]
3 years ago
8

I need help

Mathematics
1 answer:
dangina [55]3 years ago
4 0

Answer:

a)  x =3 and x=5

c)  x =-1 and x = \frac{-7}{3}

i)  x =0 and  x = \frac{-9}{2}

Step-by-step explanation:

a)

Given that the quadratic equation

    x² - 8x +15 =0

The factors of 15 = 5 × 3

   x² - 5x -3x +15 =0

  x(x -5) -3(x-5) =0

  (x-3)(x-5) =0

x =3 and x=5

c)

  3 x² + 10 x +7 =0

⇒   3x² + 3x + 7x +7 =0

⇒   3x (x +1) +7(x+1) =0

⇒  (x+1) ( 3 x +7) =0

⇒  x =-1 and x = \frac{-7}{3}

i)

     2 x ² + 9 x =0

⇒ x( 2 x + 9) =0

⇒ x =0 and 2 x = -9

⇒ x =0 and  x = \frac{-9}{2}

You might be interested in
Just doing this for fun 50 points. <br><br> 12 * 12
drek231 [11]
144 is the answer to 12x12
7 0
3 years ago
Read 2 more answers
What is divisible by 102
Flura [38]
8 is divisible by 102 ... answer ; 816 divided by 8  = 102  
3 0
3 years ago
Fill in the table using this function rule.<br> y=5x-1
zalisa [80]

Answer:

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
PLEASE ANSWER AS SOON AS POSSIBLE!
Tcecarenko [31]
The y- intercept has to be a point in the line where x is 0. Which means that in this case it would be -4.
To find the slope, use the formula: rise over run —> y2 - y1/x2 - x1
Choose any two coordinates and plug them in. Then simplify. Let me know if you have any questions by commenting:)
Hope I helped:)
6 0
3 years ago
Helpppppp plsss!!!!!!graph it on your paper​ will give brainliest
nydimaria [60]

Answer:

see attached

Step-by-step explanation:

graph y = -3/2x - 2

x Intercept:  0 = -3/2x -2

               3/2x = -2

                    x = <u>-2 (2)</u>

                            3

                    x = -4/3

                   (-4/3,  0)

y intercept: (0, -2)

6 0
2 years ago
Other questions:
  • 1/2x=11 please solve
    9·1 answer
  • The volume of a pyramid that fits exactly inside a cube is 10 cubic feet what is the volume of a cube
    12·2 answers
  • How many cm are there in one and quarter metres?
    14·1 answer
  • Solve for p :<br> p-4 -136<br> p=
    13·1 answer
  • Write a numerical expression for the verbal expression. <br> fourteen decreased by three times four
    8·2 answers
  • How many books could you read in 114 days if you read 2 books every 3 days?
    9·2 answers
  • Help please! also an explanation would be helpful
    14·2 answers
  • Plz help....................
    13·2 answers
  • Please answer <br> Will give brainlst
    15·1 answer
  • Graph the function and its parent function. Then describe the transformation. f(x) = x-6
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!