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
A potential difference of 35v is applied across the ends of a resistance of 3 ohms. How much current will flow in the resistance
aivan3 [116]

Answer:

11.67 Amperes

Step-by-step explanation:

From Ohm's law,

Ohm's law which state that a current

which flow through a conductor at a distance between two points is proportional directly to the voltage which is flowing across the two points.

I= V/R

Where

I= Current

V= potential difference =35v

R= resistance = 3 ohms

Then substitute the values we have

I = 35 / 3

I= 11.67 Amperes

5 0
3 years ago
The hypotenuse of a right triangle is 5m long. The shorter leg is 1m shorter than the longer leg. Find the side lengths of the t
Vesna [10]

Answer:

Longer Leg = 5

Shorter Leg = 144

Hypotenuse = 169

Step-by-step explanation:

5 0
2 years ago
The dimension of an aquarium are 12 inches * 6 inches * 8 inches. The water in it has a height of 7 inches.
vovikov84 [41]

Answer:1.62

Step-by-step explanation:

6 0
3 years ago
PLEASE HELP. zoom in to remove blur
AleksAgata [21]

Answer:

It's A

Step-by-step explanation:

It's just moving the equation to the right 4 units. There's no stretch, compression, or reflection.

5 0
2 years ago
Mind my hand writing but I’m not sure what sign to put the “-“ or the “+” ?
Ierofanga [76]

hello!

so the answer that you put there is actually wrong and i'll tell you why and how to do it

so since you are adding the two:

-8x + 9x = x (so you got this part right)

-12 + 4 = -8 (this is where you got it wrong, -12 added 4 goes up in value to -8)

so the final answer is x - 8

i hope this helped and have a nice day!

4 0
3 years ago
Read 2 more answers
Other questions:
  • What are the x- and y-intercepts of the graph of 5x + y = 20?
    10·1 answer
  • La contestación para contestar
    7·1 answer
  • Is the following figure a parallelogram? Why?
    12·1 answer
  • Which number is a solution of the inequality 13.4 &lt; b<br> A. 17<br> B. 8<br> C. 10<br> D. 1
    13·1 answer
  • Find the midpoint of the line segment with end coordinates of (2,1) and (4,5)​
    6·1 answer
  • suppose a triangle has two sides lengths of 32 and 35 and that angle bewteen these two sides is 120. What is the side length of
    10·1 answer
  • Find the slope using the formula.<br> (3,-2) and (3, 6)
    14·1 answer
  • Plz help!!! will give 20 points
    7·2 answers
  • (2) I'm going to be posting a lot of things so if you're really good just stay tuned
    12·1 answer
  • SOMEONE HELP ME PLEASE
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!