Ask question

Ask question

All categories

2 years ago

12

Which equation has no solution?

2 answers:

Morgarella [4.7K]2 years ago

5 0

Answer:

Therefore, |5 – 3x| = –8 has no solution.

Step-by-step explanation:

Given : |–x – 3| = 5

|2x – 1| = 0

|5 – 3x| = –8

|–x + 9| = 0.

To find : Which equation has no solution.

Solution : We have given that |–x – 3| = 5

|2x – 1| = 0

|5 – 3x| = –8

|–x + 9| = 0

As we know that values outside the modulus is positive or zero.

Then, all the option has positive values or zero except |5 – 3x| = –8 .

If we plug any values of x it would not be equal to -8 .

Therefore, |5 – 3x| = –8 has no solution.

Nuetrik [128]2 years ago

3 0

The third one.

Because the answer of the absulate value equations is always positive.

You might be interested in

Solve the following equation<br>1) 2c + c + 12 = 78

Annette [7]

Step-by-step explanation:

(2c+c) + 12 =78

3c + 12 = 78

78 - 12 = 66

66 ÷ 3 = 22

22 + 22 + 22 + 12 = 78

{ C = 22 }

4 0

3 years ago

Pls help im begging if you answer correct you get brainlylist

soldi70 [24.7K]

Answer:

I think it was painted under the light of the moon at night

Step-by-step explanation:

3 0

2 years ago

The product of 9 and sum of a number x and 12

mr_godi [17]

Answer:

9(x + 19)

Step-by-step explanation:

Product is a multiplication key word where you'll usually always put parenthesis when multiplying, and where the keyword sum comes you'd add x and 12 for your equation :)

5 0

2 years ago

An independent-measures research study uses a total of 18 participants to compare two treatment conditions. If the results are u

Luba_88 [7]

Answer:

The answer is false

Step-by-step explanation:

In a sample above 30 obs like this the confidence interval is defined as

X+- t* (s/sqrt(n)) where X is the mean t the tvalue for a given confidence level, n the size of sample and s standar deviation.

To find de appropiate value of t we must see the T table where rows are degrees of freedom and columns significance level

The significance is obtained:

significance = 1 - confidence level = 1 - 0.9 = 0.10

Degrees of freedom (df) for the inteval are

df = n - 1 = 18 - 1 = 17

So we must look for the value of a t with 17 values and significance of 0.10 which in t table is 1.740 not 1.746 ( thats the t for 16 df)

6 0

3 years ago

Element X decays radioactively with a half-life of eight minutes. If there are 800 g of element X, how long, to the nearest 10th

Harman [31]

Answer: 41.5 min

Step-by-step explanation:

This problem can be solved with the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=22 g$ is the final amount of the radioactive element

$A_{o}=800 g$ is the initial amount of the radioactive element

$t$ is the time elapsed

$h=8 min$ is the half life of the radioactive element

So, we need to substitute the given values and find $t$ from (1):

$22 g=(800 g) 2^{\frac{-t}{8 min}}$ (2)

$\frac{22 g}{800 g}=2^{\frac{-t}{8 min}}$ (3)

$\frac{11}{400}=2^{\frac{-t}{8 min}}$ (4)

Applying natural logarithm in both sides:

$ln(\frac{11}{400})=ln(2^{\frac{-t}{8 min}})$ (5)

$-3.593=-\frac{t}{8 min}ln(2)$ (6)

Clearing $t$ :

$t=41.46 min \approx 41.5 min$ This is the time elapsed

7 0

2 years ago