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3 years ago

Match each quadratic equation with the best way to solve it.

Mathematics

1 answer:

Blizzard [7]3 years ago

7 0

Answer:

5x^2 + 12x -3 =0 ---------> solve by quadratic formula

x^2 -4x = 8 ----------> solve by completing the square

4x^2 -25 = 0 ----------> solve by square root method

x^2-5x+ 6 = 0 -----------> solve by factoring

Step-by-step explanation:

1. 5x^2 + 12x -3 =0

The best way to solve this equation is quadratic formula as all the terms in the equation have coefficients it will be convenient to solve it through quadratic formula.

2. x^2 -4x = 8

The best way to solve this equation is by completing the square as the factors cannot be made directly.

3. 4x^2 -25 = 0

the best way to solve this equation is to solve by square root method as the 25 and 4 are perfect squares.

4. x^2-5x+ 6 = 0

The best way to solve this equation is to solve by factoring as it can clearly be seen that it is convenient to make factors ..

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I need help I just got in trouble for not finishing this class in time and now I’ve been stuck on the same section for weeks I h

DaniilM [7]

Answer:

$y=-\frac{5}{2}x+\frac{11}{4}$

Step-by-step explanation:

To find a line perpendicular to 2x - 5y = 20, we need to find the slope of the line. To get the slope, we can solve for y, and get the equation in the form of y=mx + b

So I will solve for y:

$2x - 5y = 20\\\\-5y=-2x+20\\\\y=\frac{2}{5} x-4$

So we know the slope is 2/5

The slope of a perpendicular line is the oposite reciprocal of original line. So the oposite reciprocal of 2/5 is -5/2. That will be our new slope

Now that we know the slope we can use the point slope formula to find an equation, then solve for y.

y-y₁=m(x-x₁)

y-4 = -5/2(x+ 1/2))

y= -5/2x + 11/4

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3 years ago

What is them mean of 1,5,8,10,11?

Vera_Pavlovna [14]

Add all the numbers up and divide by 5 to get your answer. I believe in you.

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3 years ago

Read 2 more answers

If f(x) = -3x^{2} + 1 then what is the value of f(-2)

Charra [1.4K]

Answer:

Step-by-step explanation:

-3x^{2} + 1

replace (x) with (-2)

-3(-2)^{2} + 1

6^2 +1=36+1

=37

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3 years ago

Using two normal dice, what is the probability of rolling numbers that add up to 3?

Blizzard [7]

That would be rolling a 1 and a 2 .

so possibilities are 1 on first die and 2 on the second die

OR 2 on first die and 1 on the second.

Both of these have a probability of 1/6 * 1/6 = 1/36

so required probability = 1/36 + 1/36 = 2/36 = 1/18

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3 years ago

What happens to a figure that is dilated by a factor of 13

USPshnik [31]

Answer: it gets smaller, 13 times smaller

Step-by-step explanation:

Size of the figure/13

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2 years ago