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3 years ago

2x+5=3(x+5)-x

Mathematics

2 answers:

vivado [14]3 years ago

7 0

Answer:

<u>A, No solution</u>

Step-by-step explanation:

2x + 5 = 3(x+5) - x

WARRIOR [948]3 years ago

4 0

Answer:

There are no solutions

Step-by-step explanation:

Simplify both sides of the equation.

$2x+5=3(x+5)-x\\2x+5=(3)(x)+(3)(5)+-x\\Distribute\\2x+5=3x+15+-x\\2x+5=(3x+-x)+(15)\\CLT\\2x+5=2x+152x+5=2x+15\\$

Subtract 2x from both sides

$2x+5-2x=2x+15-2x\\5=15$

Subtract 5

$5-5=15-5\\0=10$

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The graph below shows the relationship between the number of hours and the

Volgvan

Answer:

2.5

Step-by-step explanation:

7 0

3 years ago

Consider independent simple random samples that are taken to test the difference between the means of two populations. The varia

Arturiano [62]

Answer:

d. t distribution with df = 80

Step-by-step explanation:

Assuming this problem:

Consider independent simple random samples that are taken to test the difference between the means of two populations. The variances of the populations are unknown, but are assumed to be equal. The sample sizes of each population are n1 = 37 and n2 = 45. The appropriate distribution to use is the:

a. t distribution with df = 82.

b. t distribution with df = 81.

c. t distribution with df = 41.

d. t distribution with df = 80

Solution to the problem

When we have two independent samples from two normal distributions with equal variances we are assuming that

$\sigma^2_1 =\sigma^2_2 =\sigma^2$

And the statistic is given by this formula:

$t=\frac{(\bar X_1 -\bar X_2)-(\mu_{1}-\mu_2)}{S_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2}}}$

Where t follows a t distribution with $n_1+n_2 -2$ degrees of freedom and the pooled variance $S^2_p$ is given by this formula:

$\S^2_p =\frac{(n_1-1)S^2_1 +(n_2 -1)S^2_2}{n_1 +n_2 -2}$

This last one is an unbiased estimator of the common variance $\sigma^2$

So on this case the degrees of freedom are given by:

$df= 37+45-2=80$

And the best answer is:

d. t distribution with df = 80

5 0

3 years ago

1/3 x = 1/6 write answer as a fraction

Andrews [41]

Step-by-step explanation:

1/3x=1/6

x/3=1/6

cross multiply

6x=3

divide both sides by 6

x=3/6

x=1/2

6 0

3 years ago

Read 2 more answers

Jobi is taking his children on a long drive. Jobi is making snack bags to take on the drive using 40 granola bars and 32 apples.

Karolina [17]

40
$40 \times 32$

8 0

3 years ago

Manuel made at least one error as he found the value of this expression. Identify the step in which Manuel made his first error.

tamaranim1 [39]

Answer:

Manuel made his first mistake in step 2 leading to the continuous mistakes

Final answer=185

Step-by-step explanation:

Manuel made at least one error as she found the value of this expression. 2(-20) + 3[5/4(-20)] + 5[2/5(50)] + 4(50) Step 1: 2(-20) + 3(-25) + 5(20) + 4(50) Step 2: (3 + 2)(-20 + -25) + (5 + 4)(20 + 50) Step 3: 5(-45) + 9(70) Step 4: -225 + 630 Step 5: 405 Identify the step in which Chris made her first error. After identifying the step with the first error, write the corrected steps and find the final answer.

2(-20) + 3[5/4(-20)] + 5[2/5(50)] + 4(50)

Step 1: 2(-20) + 3(-25) + 5(20) + 4(50)

Step 2: -40 - 75 + 100 +

200

Step 3: -115 + 300

Step 4: 185

Manuel made his first error in step 2 by combining two different terms into one as he has done

(3 + 2)(-20 + -25) and also (5 + 4)(20 + 50)

Step 2: (3 + 2)(-20 + -25) + (5 + 4)(20 + 50)

Step 3: 5(-45) + 9(70) Step 4: -225 + 630 Step 5: 405

He should have evaluated the terms separately as I have done above, giving us 185 as the final answer in contrast to his 405 final answer.

5 0

3 years ago