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Schach [20]
3 years ago
12

How to factorise the difference of perfect squares. for the g on the top and j on the top

Mathematics
1 answer:
Fed [463]3 years ago
7 0

Answer:

see explanation

Step-by-step explanation:

A difference of two squares is factored as

a² - b² = (a - b)(a + b)

(g)

1 - 81y²

= 1² - (9y)²

= (1 - 9y)(1 + 9y)

(j)

64x² - 25y²

= (8x)² - (5y)²

= (8x - 5y)(8x + 5y)

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-1/2 (−4n+6)+3n=47 solve n=?
Sidana [21]

Answer:

N:10

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Solve by substitution. Please show work<br> -x+9y=-5<br> x-5y=1
kkurt [141]

Let's solve for x.

−x+9y=−5

Step 1: Add -9y to both sides.

−x+9y+−9y=−5+−9y

−x=−9y−5

Step 2: Divide both sides by -1.

−x ÷ −1 = −9y−5 ÷ −1

x=9y+5

THE ANSWER FOR THE OTHER EQUATION: (x-5y=1)

Let's solve for x.

x−5y=1

Step 1: Add 5y to both sides.

x−5y+5y=1+5y

x=5y+1

Answer:

x=5y+1

I hope this helped I was a little confused on what your problem meant...so if this is not what you asked for just lmk so I can fix it for you :)

3 0
2 years ago
#9. Solve: 8x + 5 = 3x + 15<br><br> X = 4<br> x = 2<br> x = 20/11<br> x = 20
Jobisdone [24]

Answer:

x = 2

Step-by-step explanation:

8x + 5 = 3x + 15

8x - 3x + 5 = 3x - 3x + 15

5x + 5 = 15

5x + 5 - 5 = 15 - 5

5x = 10

5x / 5 = 10 / 5

x = 2

6 0
2 years ago
Please help. What is the circumference of the circle? <br><br> (X+4)^2+(y-5)^2=81
PIT_PIT [208]

the radius: r^2 = 81

r =9

c = 2*pi*r

 = 2 * pi * 9

 = 18 *pi

Answer: 18*pi or approximately 56.62

8 0
3 years ago
Read 2 more answers
Use the figure to answer the question that follows:
Olegator [25]

Answer:

  • m∠SQV + m∠VQT = 180°

Step-by-step explanation:

<u> m∠SQT is substituted by 180° at step 5</u>

  • 4 m∠SQV + m∠VQT = m∠SQT Angle Addition Postulate
  • 5 m∠SQV + m∠VQT = 180° Substitution Property of Equality
  • 6 m∠VQT + m∠ZRS = 180° Same-Side Interior Angles Theorem
3 0
3 years ago
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