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4 years ago

What is 4|2y-3|-1=11

2 answers:

4 0

<span>implifying 4[2y + -3] + -1 = 11 Reorder the terms: 4[-3 + 2y] + -1 = 11 [-3 * 4 + 2y * 4] + -1 = 11 [-12 + 8y] + -1 = 11 Reorder the terms: -12 + -1 + 8y = 11 Combine like terms: -12 + -1 = -13 -13 + 8y = 11 Solving -13 + 8y = 11 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + 8y = 11 + 13 Combine like terms: -13 + 13 = 0 0 + 8y = 11 + 13 8y = 11 + 13 Combine like terms: 11 + 13 = 24 8y = 24 Divide each side by '8'. y = 3 Simplifying y = 3</span>

bekas [8.4K]4 years ago

4 0

Solve for y, simplifying both sides of the equation then isolating the variable. y=3,0

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Suppose that a jewelry store tracked the amount of emeralds they sold each week to more accurately estimate how many emeralds to

RUDIKE [14]

Answer:

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

And for this case the 95% confidence interval is given by (2.13; 2.37)

We have a point of estimate for the sample mean with this formula:

$\bar X = \frac{Upper+ Lower}{2}= \frac{3.37+2.13}{2}= 2.75$

And for the margin of error we have the following estimation:

$ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

And for this case the 95% confidence interval is given by (2.13; 2.37)

We have a point of estimate for the sample mean with this formula:

$\bar X = \frac{Upper+ Lower}{2}= \frac{3.37+2.13}{2}= 2.75$

And for the margin of error we have the following estimation:

$ME= \frac{Upper -Lower}{2}= \frac{3.37-2.13}{2}= 0.62$

5 0

3 years ago

If a circle is 9 pi cm what is the radius of the circle

olganol [36]

Answer:

Step-by-step explanation:

L = 2×π×r

9π cm = 2πr

9 cm = 2r

r = 4.5 cm

5 0

3 years ago

Expresión for the calculation 5 times the number 25 and then subtract the quotient of 14 and 7

Rudik [331]

Answer:

(5*25) - (14/7)

<em>* means multiply and / means divide</em>

7 0

3 years ago

Helppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

maks197457 [2]

What you must do in this case is to find the roots of the polynomial.
We have then:
x ^ 2 + 20x + 100 = 36
Rewriting:
x ^ 2 + 20x + 64 = 0
The values of the roots are:
x1 = -4
x2 = -16
Remember that the values of the roots are what make the polinome zero
Answer:
x1 = -4
x2 = -16

3 0

3 years ago

What is 3.06 rounded to the nearest whole number

Gnom [1K]

3.06 rounded to the nearest whole number is 3.
.06 is much closer to 0 than it is to 1, so round down.
3.06 rounded down is 3, so that is your answer.

4 0

3 years ago