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3 years ago

What is x squared minus 4x minus 45

1 answer:

3 0

That's a second-degree expression in 'x'. It represents a number,
but the number it represents completely depends on the value of 'x'.
And if the value of 'x' ever changes, then the value of the whole
expression instantly changes.

The expression is also the product of (x + 5) and (x - 9) .

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Joe solved this problem on a math test. 5/6 - 1/4 = 7/8

Travka [436]

Answer:

This is incorrect, the correct answer is 7/12

Step-by-step explanation:

5 0

3 years ago

1. Which expressions are equivalent to 5^6x5^-3

Olenka [21]

You just add both of the powers , so 6-3 is 3

the answer is 5^3

7 0

3 years ago

Read 2 more answers

The chamber of commerce for a beach town asked a random sample of city-dwellers, "Would you like to live at the beach?” Based on

Dvinal [7]

Answer:

Ummm... ya its a becasue 95 is more then 50 (brainlest plzzzzzzzzzzzzzz)

Step-by-step explanation:

6 0

3 years ago

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch:The

valkas [14]

Answer: Therefore, Option 'A' is correct.

Step-by-step explanation:

Since we have given that

Two class midpoints are 62.5 and 65.5

So, the class interval would be

$65.5-62.5=3$

So, the limits of lower class are $x_1\ and\ x_2$

The limits of upper class are $x_2\ and\ x_3$

So, it becomes,

$\dfrac{x_1+x_2}{2}=62.5\\\\x_1+x_2=62.5\times 2=125$

and

$\dfrac{x_2+x_3}{2}=65.5\\\\x_2+x_3=65.5\times 2=131$

Since we have given that interval is 3.

So, $x_2-x_1=3\ and\ x_3-x_2=3$

So, by solving all the questions, we get that

$x_2+x_1=125\\\\x_2-x_1=3\\\\-------------------------\\\\2x_2=128\\\\x_2=64\\\\x_2-x_1=3\\\\64-x_1=3\\\\x_1=61\\\\and\\\\x_3-x_2=3\\\\x_3-64=3\\\\x_3=67$

Hence, the class limits would be

(61,64) and (64,67).

And the class limits of lowest class are 61 and 64.

Therefore, Option 'A' is correct.

4 0

4 years ago

A box contains two defective Christmas tree lights that have been inadvertently mixed with eight nondefective lights. If the lig

REY [17]

Possibility 1: nondefective-defective-defective
possibility 2: defective-nondefective-defective

possibility 1: 8/10x 2/9 x 1/8 = 16/720=1/45
possibility 2: 2/10 x 8/9 x 1/8= 16/720=1/45

answer: 2/45

6 0

4 years ago