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3 years ago

What is the value of x in the equation 8x – 2y = 48, when y = 4?

Mathematics

1 answer:

luda_lava [24]3 years ago

8 0

Answer:

Step-by-step explanation:

8x-2y=48, replace y with 4, 8x-2(4)=48, multiply, 8x-8=48, add 8 to both sides to remove the -8, 8x=56 and finally divide by 8 to remove 8 from x, x=7.

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An electric sale gives a reading equal to the true weight plus a random error that isnormally distributed with mean 0 and standa

Pepsi [2]

Answer:

a) 95% confidence interval estimate of the true weight is (3.026, 3.274)

b) 99% confidence interval estimate of the true weight is (2.944, 3.356)

Step-by-step explanation:

Confidence Interval can be calculated using M±ME where

M is the mean of five successive weightings (3.150)

ME is the margin of error from the mean

And margin of error (ME) can be calculated using the formula

ME= $\frac{t*s}{\sqrt{N} }$ where

t is the corresponding statistic in the given confidence level and degrees of freedom(t-score)

s is the standard deviation of the random error (0.1)

N is the sample size (5)

Using the numbers 95% confidence interval estimate of the true weight is:

3.150± $\frac{2.776*0.1}{\sqrt{5} }$ ≈3.150±0.124

And 99% confidence interval estimate of the true weight is:

3.150± $\frac{4.604*0.1}{\sqrt{5} }$ ≈3.150±0.206

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3 years ago

Is every whole number a multiple of 1?

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Yes, it is. Even 0. 1x0=0

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3 years ago

Kay scored above 90% on five of her math quizzes, 80% to 90% on fourteen of them, and 70% to 80% on two of them. What is the exp

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3 years ago

The baseball coach bought 2 new baseballs for $2 each. The basketball coach bought 6 new basketballs for $13 each. How much more

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Read 2 more answers

GC = 4x + 5, CF = 3x – 2, and GF = 24. What is the value of x?

Aleonysh [2.5K]

G = F(4x+5)/ 3x-2
C = (4x+5) (3x-2)/ 24C
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4 years ago