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
kozerog [31]
2 years ago
13

Which would be the best method to use to solve the following equations? Explain your reasoning.

Mathematics
1 answer:
o-na [289]2 years ago
7 0

A. square root property

3x^2-192=0\\x^2-66=0\\x^2=66\\x= -\sqrt{66} or \sqrt{66}

it has one value with x which is x^2 and it cn be easily solved without having to factorise, quadratic formula cant be used as it need ax^2+bx+c=0 format

B. factorising

x^2-x-6=0\\x^2+2x-3x-6=0\\(x+2)(x-3)=0\\x+2=0  and  x-3=0\\x= -2 \\x= 3

i just felt like this was easier to factorise than the other 2 options left

C. Completing the square

x^2-6x-7=0\\(x-3)^2=0\\x= -1\\x= 7

same reason personal preference

D- Quadratic

x^2-17x-7=0\\x=\frac{-(-17)+\sqrt{(-17)^2-4(1)(-7)} }{2(1)} \\x=\frac{-(-17)-\sqrt{(-17)^2-4(1)(-7)} }{2(1)}\\x=17.4\\x=-0.402

the 17 kinda threw me off and i didnt wanna get on factorising or doing completing the square so quadratic formal

You might be interested in
Pamela drove her car 99 kilometers and used 9 liters of fuel. She wants to know how many kilometers (k)left parenthesis, k, righ
EastWind [94]

Answer:

132 kilo meters

Step-by-step explanation:

Pro por tions:

9 lite rs ⇒ 99 km

12 lite rs  ⇒  P km

P = 99*12/9

P = 132 km

8 0
3 years ago
Find where the function is increasing and decreasing. G(x)=1/x^2 +7
eduard
Inc on (-inf,0)
Dec on (0,inf)
3 0
4 years ago
N - 4 = 3n + 6<br> what number does n represent?
pav-90 [236]

Answer:

n = -5

Step-by-step explanation:

n - 4 = 3n + 6

n = 3n + 10

-2n = 10

n = -5

7 0
3 years ago
Read 2 more answers
Write an equation for the function that includes the following points (2, 32) and (3, 64)
luda_lava [24]

Answer:

y=32x-32

Step-by-step explanation:

this time no algorithm or equation was needed i saw that if the equation was y=32x there would be ordered pairs (1,32) and (2,64) so to delay it by 1  on the x side just subtract the slope from the y - intercept sorry if that doesn't make sense

6 0
3 years ago
plz help this is hard and i cant figure it out ---------------------------------------------------------------------------------
Phantasy [73]

Answer:

2

Step-by-step explanation:

these are alternative interior angles so they are equal to each other (congruent) soooo

9x + 4 = 3x + 16

subtract:

9x = 3x + 12

6x = 12

divide

x = 2

8 0
2 years ago
Other questions:
  • I need to show work help meee
    5·1 answer
  • A human hair was measured to be 8.0×10−48.0×10-4 inch thick. A cat hair was measured to be 4.0×10−14.0×10-1 inch thick. How much
    6·1 answer
  • Picture shown please help !!!
    15·1 answer
  • Wich of the following best describes the expression 4(y+6)
    13·1 answer
  • Write an equation of the line in slope-intercept form.
    8·1 answer
  • Find the measure of one interior angle in a regular 144-gon. Round to the nearest
    15·1 answer
  • Is 15 a whole number <br> 1. yes<br> 2. no
    15·2 answers
  • Lelani has 64 baseball cards. This is 4 times as many baseball cards as Paul has. How many baseball cards does Paul have?​
    12·2 answers
  • Pls answer..<br>5 men earns Rs. 7500 in 3 days, gind the amount that earn by 3 men by 4 days, ​
    11·1 answer
  • If £1 is equal to 99.72 rupees and the post office only has 500 rupee papers how much can I change out of £450
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!