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3 years ago

NEED ASAP PLEASE

Mathematics

3 answers:

Vesna [10]3 years ago

7 1

Answer:

116.15

Step-by-step explanation:

1.95 - 30.00 - 7.20 - 38.50 = 38.50

77.65 = 38.50

x = $116.15

liberstina [14]3 years ago

4 1

Answer:

x - [1.95 + 30 + 7.20 + $\frac{2}{3}$ {x - (1.95 + 30 + 7.20)}] = 38.5

Step-by-step explanation:

Let the total amount of money Liza has = $x.

Then, According to the question we get equation,

x - [1.95 + 30 + 7.20 + $\frac{2}{3}$ {x - (1.95 + 30 + 7.20)}] = 38.5

⇒ x - [39.15 + $\frac{2}{3}$ {x - 39.15}] = 38.5

⇒ x - 39.15 - $\frac{2}{3}$ {x - 39.15} = 38.5

⇒ x - 39.15 = 3 × 38.5

⇒ x - 39.15 = 115.5

⇒ x = 154.65

Thus, she earned $154.65 by taking care of her neighbor's pet.

xxbtn2 years ago

0 0

1/3(m-1.95-30.0-7.20)=38.50
final answer:154.65

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Answer:

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Step-by-step explanation:

on calculation, we find that sample mean = 30843 and sample standard deviation = 3018.504, and n=20

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Sample Size (n) = 20

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alpha (a) = 1 - 0.95 = 0.05

z critical value for 95% confidence interval:

z(a/2) = z(0.025) = 1.96

Margin of Error (ME) = z(a/2) x SE = 1314.808

95% confidence interval is given by:

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2)when std dev of population is not known, we use sample's, but we have to use t instead of z

Sample Mean = 30841

SD = 3018.504

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 674.958

alpha (a) = 1-0.9 = 0.1

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t(a/2, n-1 ) = 1.7291

Margin of Error (ME) = t(a/2,n-1)x SE = 1167.0699

90% confidence interval is given by:

Sample Mean +/- (Margin of Error)

30841 +/- 1167.0699 = (29673.9301 , 32008.0699)

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Answer:

Part A : y²(x + 2)(x + 4)

Part B: (x + 4) (x + 4)

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