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3 years ago

Please solve its URGENT

Mathematics

1 answer:

ZanzabumX [31]3 years ago

7 0

The answer is X= -25

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Complete the square to re-write the quadratic function vertex form: y=x2 + 4x + 4

ankoles [38]

Answer:

Step-by-step explanation:

y=x²+4x+4

or y=(x+2)²

or y=(x+2)²+0

vertex Is (-2,0)

3 0

3 years ago

perry thinks that 1/2 and 2/4 are equivalent fractions. but when he draws the number lines to the right he sees that 1/2 and 2/4

Misha Larkins [42]

He is correct but he might be doughting him self

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4 years ago

If he is correct, what is the probability that the mean of a sample of 68 computers would differ from the population mean by les

elena-14-01-66 [18.8K]

Complete Question

The quality control manager at a computer manufacturing company believes that the mean life of a computer is 91 months with a standard deviation of 10 months if he is correct. what is the probability that the mean of a sample of 68 computers would differ from the population mean by less than 2.08 months? Round your answer to four decimal places. Answer How to enter your answer Tables Keypad

Answer:

$P(-1.72$

Step-by-step explanation:

From the question we are told that:

Population mean \mu=91

Sample Mean \=x =2.08

Standard Deviation \sigma=10

Sample size n=68

Generally the Probability that The sample mean would differ from the population mean

P(|\=x-\mu|<2.08)

From Table

$P(|\=x-\mu|$

T Test

$Z=\frac{\=x-\mu}{\frac{\sigma}{\sqrt{n} } }$

$Z=\frac{2.08}{\frac{10}{\sqrt{68} } }$

$Z=1.72$

$P(|\=x-\mu|$

$P(-1.72$

Therefore From Table

$P(-1.72$

5 0

3 years ago

30=Five-sixthsY solve for Y

borishaifa [10]

Given :-

A linear Question is given to us .

The equⁿ is $\sf 30 = \dfrac{5}{6}y$

To Find :-

The value of y .

Solution:-

Taking the given equⁿ :

$\bf \implies30=\dfrac{5}{6}y$

$\bf \implies 30\times 6=5y$

$\bf\implies y=\dfrac{\cancel{30}\times6}{\cancel5}$

$\underline{\boxed{\red{\bf{\longmapsto \qquad y \qquad = \qquad 36 \qquad}}}}$

$\boxed{\green{\bf\pink{\dag}\: Hence\:the\:value\:of\:y\:is\:36.}}$

Some rules :-

On transposing numbers or variables,

Plus changes to minus.
Minus changes to plus .
Multiply changes to divide.
Divide changes to multiply.

8 0

4 years ago

Multiply and simplify (3x-2)²)

ankoles [38]

(3x - 2)²
= (3x - 2) (3x - 2) use distributive property or FOIL
= 3x(3x) + 3x(-2) - 2(3x) - 2(-2)
= 9x² - 6x - 6x + 4 combine like terms
= 9x² - 12x + 4

6 0

3 years ago

Read 2 more answers