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3 years ago

3/8 - 1/4x =1/2 x - 3/4 please help solve for x and show work

Mathematics

1 answer:

cluponka [151]3 years ago

7 0

Answer:

x=3/2 (or 1.5)

Step-by-step explanation:

Subtract 3/8 from both sides

Simplify

Subtract 1/2x from both sides

Simplify

Multiply both sides by 4

Simplify

Divide both sides by -3

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A study of 138 penalty shots in World Cup Finals games between 1982 and 1994 found that the goalkeeper correctly guessed the dir

vladimir2022 [97]

Answer:

z=-2.09

Step-by-step explanation:

Given that a study of 138 penalty shots in World Cup Finals games between 1982 and 1994 found that the goalkeeper correctly guessed the direction of the kick only 41% of the time.

Set up hypotheses as:

$H_0: p=0.50\\H_a: p$

(left tailed test at 5% significance level)

Standard error = 0.043

Sample proportion p = 0.41

p difference = $0.41-0.50=-0.09$

Test statistic Z = p diff/std error

= $\frac{-0.09}{0.043} \\=-2.09$

Z = -2.09

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3 years ago

Which of the figures appear to to congruent

Irina18 [472]

Answer:

Step-by-step explanation:

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3 years ago

Operations with Radical Expressions

lisov135 [29]

Answer: $30\sqrt{11}$

Step-by-step explanation:

$3\sqrt{50} * \sqrt{22}$

= $3\sqrt{5*5*2} * \sqrt{2*11}$

= $3\sqrt{5*5*2*2*11}$

= $3*5*2\sqrt{11}$

= $30\sqrt{11}$

******************************************

Answer: $6\sqrt{30}$

Step-by-step explanation:

$\sqrt{20} * \sqrt{3} * \sqrt{18}$

= $\sqrt{2*2*5} * \sqrt{3} * \sqrt{3*3*2}$

= $\sqrt{2*2*5*3*3*3*2}$

= $2*3\sqrt{5*3*2}$

= $6\sqrt{30}$

********************************************

Answer: $-\sqrt{5}$

Step-by-step explanation:

$4\sqrt{20} - 3\sqrt{45}$

= $4\sqrt{2*2*5} - 3\sqrt{3*3*5}$

= $4*2\sqrt{5} - 3*3\sqrt{5}$

= $8\sqrt{5} - 9\sqrt{5}$

= $-\sqrt{5}$

********************************************

Answer: $4\sqrt{5}$

Step-by-step explanation:

$2\sqrt{5} + 3\sqrt{5} - \sqrt{5}$

= $(2+3-1)\sqrt{5}$

= $4\sqrt{5}$

********************************************

Answer: $46\sqrt{2}$

Step-by-step explanation:

$4\sqrt{32} + 6\sqrt{50}$

= $4\sqrt{2*2*2*2*2} + 6\sqrt{2*5*5}$

= $4*2*2\sqrt{2} + 6*5\sqrt{2}$

= $16\sqrt{2} + 30\sqrt{2}$

= $46\sqrt{2}$

7 0

3 years ago

5(x - 1) and 5x - 1 is it equivalent

suter [353]

No, 5(x-1) expands out to make 5x-5. So 5x-1 and 5x-5 aren’t equivalent.

6 0

3 years ago

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Solve cot x + 2cot x sin x=0 for 0 degrees <= x <= 180 degrees.

Svetradugi [14.3K]

Answer:

90°

Step-by-step explanation:

sample answer given on edge

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3 years ago