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3 years ago

What is 17-4x=1-4x+12-2x

Mathematics

1 answer:

SIZIF [17.4K]3 years ago

5 0

17-4x = 1-4x+12-2x

17-4x = 13-6x | +4x

17 = 13-2x | -13

4 = -2x | :(-2)

-2 = x

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The price of a video game was reduced from $70.00 to $40.00. By what percentage was the price of the

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Answer:

43%

Step-by-step explanation:

(40-70) ÷ 70 = -30 ÷ 70 = -0.43 or -43%

Answer: The video game was reduced by 43%.

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3 years ago

Given the function f(x) = −2x + 8, find x if f(x) = 14 ...?

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A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Houston. The stud

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Answer:

$-0.048$

Do not reject $H_0:P_1-P_2=0$

Step-by-step explanation:

From the question we are told that

Sample size $n_1=350$

Sample size $n_2=250$

Sample proportion 1 $\hat P= \frac{25}{350} =>0.07$

Sample proportion 2 $\hat P= \frac{19}{250} =>0.076$

95% confidence interval

Generally for 95% confidence level

Level of significance

$\alpha = 1-0.95=>0.05$

$\alpha /2=\frac{0.05}{2} =>0.025$

Therefore

$Z_a_/_2=1.96$

Generally the equation for confidence interval between $P_1 - P_2$ is mathematically given as

$(\hat P_1-\hat P_2)\pm Z_a_/_2\sqrt{\frac{\hat P_1(1-\hat P_1)}{n_1}+\frac{\hat P_2(1-\hat P_2)}{n_2} }$

$(0.07-0.076)\pm 1.96\sqrt{\frac{0.07(1-0.07)}{350}+\frac{0.076(1-0.076)}{250} }$

$(0.07-0.076)\pm 1.96\sqrt{4.66896*10^-^4 }$

$(-0.006)\pm 0.042$

$(-0.006)- 0.042=>-0.048$

$(-0.006)+ 0.042=>0.036$

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$-0.048$

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Given the confidence interval has zero

Therefore do not reject $H_0:P_1-P_2=0$

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2 years ago

What is the LCD of 2/7 and 12/5

SashulF [63]

Answer:

10/35 84/35

Step-by-step explanation:

2/7 12/5

7 × 5 = 35

2 × 5 = 10

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3 years ago