All categories

4 years ago

Which method can't you use to solve this problem? x^2-47=0

2 answers:

4 0

Which method can't you use to solve this problem? x^2-47=0

☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆A.) Factoring
Cannot factor, no common factors.

B.) Squareroots

C.) Quadratic Formula

prisoha [69]4 years ago

4 0

I️ dislike this question because all 3 methods could be used to solve. Although there are no rational factors, this equation can obviously be rewritten as a difference of squares as (x + sqrt(47))(x-sqrt(47)). A square root could be used by adding 47 to both sides and taking the square root. The quadratic formula can clearly be used as well. The result for each of these methods is that x = +-sqrt(47), which is the correct answer.

You might be interested in

Pls help me <br><img src="https://tex.z-dn.net/?f=49%20%3D%20%20%7Bx%7D%5E%7B2%7D%20" id="TexFormula1" title="49 = {x}^{2} " al

Nitella [24]

Answer:

x=-7

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Write the equation to the line parallel to y= 3x – 5 that goes through the point (-2, -7) using any form.

MakcuM [25]

Answer:

y = 3x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 3x - 5 ← is in slope- intercept form

with slope m = 3

Parallel lines have equal slopes , then

y = 3x + c ← is the partial equation

To find c substitute (- 2, - 7 ) into the partial equation

- 7 = - 6 + c ⇒ c = - 7 + 6 = - 1

y = 3x - 1 ← equation of parallel line

8 0

2 years ago

Can you please help me with this thank you so much

polet [3.4K]

Just add 303.28+295.73 and you will get $599.01 as your answer!!! I hope this helps!!!

7 0

4 years ago

A set of 6 number cards contain the numbers 2, 5, 7, 8, 9, and 11. Which ratio is less than the ratio of odd number cards to tot

Tamiku [17]

Answer:

$Ratio = 2:3$

Step-by-step explanation:

Given

$Cards = \{2,5,7,8,9,11\}$

Required

Ratio of odd numbers to total

First, list out the odd numbers

$Odd = \{5,7,9,11\}$

The card has 4 odd numbers out of a total of 6.

So, the ratio is:

$Ratio = Odd : Total$

$Ratio = 4:6$

Divide by 2

$Ratio = 2:3$

<em>Hence, the ratio of odd to total is 2 to 3</em>

3 0

3 years ago

The diameter of a pipe is normally distributed, with a mean of 0.4 inch and a variance of 0.0009. What is the probability that t

Margarita [4]

Answer:

P(X > 0.418) = 0.27425

Step-by-step explanation:

We are given;

Population mean; μ = 0.4 inch

Variance; Var = 0.0009

Sample mean; x¯ = 0.418

First of all let's get the standard deviation which is;

σ = √Var

σ = √0.0009

σ = 0.03

Now, z - score formula is;

z = (x¯ - μ)/σ

z = (0.418 - 0.4)/0.03

z = 0.6

We want to find the probability that the diameter of a randomly selected pipe will exceed 0.418 inch. Thus;

P(X > 0.418) = 1 - P(X ≤ 0.418)

From z-distribution table attached, P(X ≤ 0.418) = P(Z) = 0.72575

Thus;

P(X > 0.418) = 1 - 0.72575

P(X > 0.418) = 0.27425

5 0

3 years ago