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
zmey [24]
3 years ago
13

Determine the next step for solving the quadratic equation by completing the square. 0 = –2x2 + 2x + 3 –3 = –2x2 + 2x –3 = –2(x2

– x) –3 + = –2(x2 – x + ) = –2(x – )2 = (x – )2 The two solutions are
Mathematics
2 answers:
VLD [36.1K]3 years ago
8 0
We have that
0 = –2x²<span>+ 2x + 3
</span>

Group terms that contain the same variable, and move the constant to the opposite side of the equation

(–2x²+ 2x)=-3

Factor the leading coefficient 

-2*(x²-x)=-3

Complete the square. Remember to balance the equation by adding the same constants to each side

-2*(x²-x+0.25)=-3-0.50

Rewrite as perfect squares

-2*(x-0.5)²=-3.50

(x-0.5)²=-3.50/-2

(x-0.5)²=1.75------> square root both sides

(+/-)(x-0.5)=√7/2

(+)(x-0.5)=√7/2----> (√7/2)+0.5----> x=1.823

(-)(x-0.5)=√5/2-----> x=0.5-(√7/2)----> x=-0.823

the solutions are

x=1.823

x=-0.823

guapka [62]3 years ago
5 0

Answer:

-1/2, 1/4, 1/2

Step-by-step explanation:

You might be interested in
HELP FAST PLEASE! FOR BRAINLIEST!!
Gekata [30.6K]

Answer:

1. C-surface area

2. The formula V = B x h is not suitable, because the surface area of wrapping paper needed to be calculated, not the volume.

V = Ph + 2B = 15x(5+6+9) + 2x 9x3/2 = 327

3. B: Base area

   H: Height of solid

4. She said V =220, while V_real = 7x6x4 =168

=> She is wrong

5. Check the Pythagorean theorem 3^2+4^2 =9+16 =25 =5^2

=> Right triangle.

=> Area = 3x4/2 =6

4 0
3 years ago
A store sells toys in bulk. It sells wooden blocks for $5 a pound and plastic bricks for $10
Veseljchak [2.6K]

9514 1404 393

Answer:

  • 6 # plastic bricks
  • 4 # wooden blocks

Step-by-step explanation:

Let p represent the number of pounds of plastic bricks in the mix. Then the number of pounds of wooden blocks is (10-p), and the total cost is ...

  10p +5(10-p) = 80

  5p = 30 . . . . . . . . . subtract 50

  p = 6 . . . . divide by 5; there are 6 pounds of plastic bricks in the mix

4 pounds of wooden blocks and 6 pounds of plastic bricks should be used to make a 10-lb mix worth $80.

5 0
3 years ago
7z/4+5x if z=8 and x=3 PLEASE HELP THIS IS DUE IN 20 MINS.
Taya2010 [7]

Answer:

29

Step-by-step explanation:

7(8)/4+5(3)

56/4+15

14+15

29

5 0
2 years ago
X+y=3<br> 2x-y=0 <br> substituition method
Veronika [31]

Answer:

(1, 2 )

Step-by-step explanation:

x + y = 3 (subtract x from both sides )

y = 3 - x → (1)

2x - y = 0 → (2)

Substitute y = 3 - x into (2)

2x - (3 - x) = 0

2x - 3 + x = 0

3x - 3 = 0 ( add 3 to both sides )

3x = 3 ( divide both sides by 3 )

x = 1

Substitute x = 1 into (1)

y = 3 - 1 = 2

solution is (1, 2 )

5 0
2 years ago
5. Which of the following is a pair of alternate exterior angles?
konstantin123 [22]
It angles 1 and 7 good luck
6 0
3 years ago
Read 2 more answers
Other questions:
  • Using the technique in the model above, find the missing sides in this 30° 600-90 right triangle.longShort 7Hypotenuse3.571314
    14·1 answer
  • Analyze each step to identify if Andy made an error. Yes, he made an error in Step 1. He switched the x and y values. Yes, he ma
    10·3 answers
  • There are a total of 64 students in the video game club and the Pokémon club. The video game club has 10
    8·1 answer
  • John kept track of how many baskets were made in a basketball game. After 4 minutes, 5 baskets were made.
    12·1 answer
  • the graph of y= 1/x is translated 3 units up and 2 units to the left. what is an equation of the translated graph
    7·1 answer
  • Length and breadth of a rectangular field is 5 : 3. If the breadth of rectangle is 60m, find the length of the rectangle.
    12·1 answer
  • NEED HELP ASAP
    14·1 answer
  • What are the values of a and b ?
    14·1 answer
  • Hi everyone,Can someone please explain me these I am confused I really need help if you can help please help me.
    5·2 answers
  • I NEED HELP WITH MATH
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!