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Oksanka [162]
4 years ago
6

Add to each side x2 – 8x = 9 to complete the square

Mathematics
2 answers:
ale4655 [162]4 years ago
8 0
X=9, -1

Use the formula in order to create a new term. Solve for x by using this term to complete the square.
( \frac{b}{2})^{2}
PtichkaEL [24]4 years ago
5 0
For this case we have the following equation:
 x2 - 8x = 9
 By completing squares we have:
 x2 - 8x + (-8/2) ^ 2 = 9 + (-8/2) ^ 2
 Rewriting we have:
 x2 - 8x + (-4) ^ 2 = 9 + (-4) ^ 2
 x2 - 8x + 16 = 9 + 16
 (x-4) ^ 2 = 25
 Answer:
 
(x-4) ^ 2 = 25
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Two cylinders are similar. The surface area of one is 49 cm ^ 2 , and the surface area of the other is 121 cm ^ 2 . Find the sca
dalvyx [7]

Answer:

7 : 17.29

Step-by-step explanation:

==>Given:

Two similar cylinders:

Surface area of Cylinder A = 49cm²

Surface area of Cylinder B = 121cm²

==>Required:

Scale factor between both cylinders

==>Solution:

We can easily get the scale factor between both by taking the following steps:

=>Set up a ratio of their surface area:

Smaller cone surface area : larger cone surface area

49:121

= 49/121

=>Simplify the ratio gotten:

Dividing the denominator and the numerator by 7, would give us,

7/17.29

= 7:17.29

8 0
3 years ago
Read 2 more answers
UPPER AND LOWER BOUNDS - PLEASE HELP!
Marianna [84]
Qn. 1
Lower bound for Zoe's weight = 62 - (1/2) = 62 - 0.5 = 61.5 kg

Qn. 2
Upper bound for length AB = 8.3+ (0.1/2) = 8.3+0.05 = 8.35 cm

Qn. 3
Upper bound for Anu's wight = 83+(0.5/2) = 83+0.25 = 83.25 kg

Qn. 4
Lower bound for length CD = 27-(0.5/2) = 27-0.25 = 26.75 cm

Qn. 5
Upper bound for sides of the hexagon = 3.6+(0.1/2) = 3.6+0.05 = 3.65 cm
Upper bound for the perimeter = upper bound for the sides*6 = 3.65*6 = 21.9 cm

Qn. 6
Perimeter = 4*length => side = Perimeter/4 = 24/4 = 6
Bound = 0.5/4 = 0.125
Lower bound of the length = 6-0.125 = 5.875 cm

Qn. 7
For the area,
Upper bound = 80+(10/2) 80+5 = 85 cm^2
For the length
Upper bound = 12+(1/2) = 12+0.5 = 12.5

Then, upper bound for the width = Upper bound for the area/upper bound for the length = 85/12.5 = 6.8 cm

Qn. 8
Lower bound for the area = 230-(1/2) = 230-0.5 = 229.5 cm^2
Lower bound for the sides of the square = Sqrt(Lower bound of the area) = Sqrt (229.5) = 15.15
Then,
Lower bound of perimeter = 4(Length) = 4*15.15 = 60.6 cm
8 0
4 years ago
The total land area of the United States is about 3,483,511 square miles more than the total land area of Tennessee, which is ab
Gelneren [198K]

Total land area of United States is 3,537,438.

Step-by-step explanation:

Given,

Total land area of Tennessee =  53927

According to given statement,

Total land of United States = Land of Tennessee + 3483511

Total\ land\ of\ United\ States = 53927+3483511\\Total\ land\ of\ United\ States = 3537438

Total land area of United States is 3,537,438.

Keywords: Land area, addition

Learn more about addition at:

  • brainly.com/question/2125469
  • brainly.com/question/2135348

#LearnwithBrainly

6 0
4 years ago
Read 2 more answers
Find f(2) if f(x) = 2x + 1.<br> A) 3 <br> B) 5 <br> C) 7 <br> D) 9
Rufina [12.5K]

Answer:

The answer to your question is letter B

Step-by-step explanation:

Process

1.- Write the equation

                                   f(x) = 2x + 1

find f(2)

2.- Substitute x for 2

                                  f(2) = 2(2) + 1

3.- Simplify

                                 f(2) = 4 + 1

                                 f(2) = 5

5 0
4 years ago
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I need help with a chapter quiz
Lostsunrise [7]

Answer:

hjhjkjhhu

Step-by-step explanation:

7 0
3 years ago
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