For number 81 and 84 it asks me to Complete the square to form a perfect-square trinomial. Could someone explain how I find the answers to these two questions?

Answers

Answer 1

Answer: To complete the square, you want to add a number that will allow the number to be factored into terms of the form (x + ?)^2

For x^2 + x + ?:
For (x + ?)(x + ?), we want both ? to add up the 1 (the number in front of x), and since both ? have to be the same number, ? must equal 1/2 (1/2 + 1/2 = 1).
Multiplying this out:
(x + 1/2)^2
(x + 1/2)(x + 1/2)
x^2 + x + 1/4

Answer: x^2 + x + 1/4

For x^2 + 6x + ?:
For (x + ?)(x + ?), we want both ? to add up the 6 (the number in front of x), and since both ? have to be the same number, ? must equal 3 (3 + 3 = 6).
Multiplying this out:
(x + 3)^2
(x + 3)(x + 3)
x^2 + 6x + 9

Answer: x^2 + 6x + 9

Answer 2

Answer: completeing the squarein formax^2+b+c=01st move c to other side or ignore it if not present2nd. make sure a=1, if not, divide both sides by a3rd divide b by 2 and squaer that ((b/2)^2) and add that to both sidesfactor perfect square81.ignore ca=1 so goodb=1 so 1/2, then squaer that which is 1/4that is the blank space1/484.ignore c since not presenta is equal to 1b=6 so 1/2 of that is 3, 3^2=99 is the blank81. blank is 1/484. blank is 9

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23 POINTS PLZ HELP Explain at least one reason why knowing the surface area or the volume of your rectangular prism is important

Answers

Knowing the surface area of a rectangular prism is important to know because it helps you come up with a formula for most equations

The coordinate grid shows the plot of four equationsWhich set of equations has (1, 4) as its solution?

A and D
B and D
A and C
B and C

Answers

your answer is B and D because it both goes through 1 and 4. and as a matter of fact they both intersect each other.
A can't be because it's -3 and +4.
C can't be because it's 4 and 3.
so that leaves us with B and D.
B is 1 and 4 and D is 1 and 4 but they both intersect each other.
the graph is just playing you or tricking you that's all.

If you look at the point (1,4), only two lines go through it.

Lines B and Lines D pass through points (1,4)

Your answer is B) B and D.

Which fraction is equivalent to 0.5? A. 0/5

B. 5/10

C. 5/100

D. 2/1

Answers

B. 5/10 is equivalent to 0.5

B, 5/10=1/2=0,5
So 0,5 is equal to 5/10

Find the product 4×6×50 tell what strategy you used

Answers

Answer:

1200

Step-by-step explanation:

4x6= 24

24x 5= 120

120x 10= 1200

I would multiply 4 times 6 and then times 50

Abby can buy T-shirts in packs of 5 for $11.25 or in packs of 2 for $5.98. How much money does she save by buying 20 T-shirts at the better price?

Answers

Answer:

She saves $14.80

Step-by-step explanation:

11.25(4)=$45

5.98(10)=$59.80

59.80-45

14.8

Find the 'x' and 'y' intercepts of the line 3x + 6y = 24 . x = 8 and y = - 4
x = 8 and y = 4
x = 4 and y = -8
x = -4 and y = 8

Answers

Answer:

(8, -4)

Step-by-step explanation:

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