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Ksenya-84 [330]

3 years ago

11

PLS HELP

2 answers:

barxatty [35]3 years ago

6 0

I did the JMHS quiz, all I can tell you is the answer is NOT C) AA.

FrozenT [24]3 years ago

3 0

They are similar, but I don't exactly know why. It has something to do with the angles, I know that.

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What number should be added to the expression x^2+2x to change it into a perfect square trinomial?

sweet [91]

To make x^2 + 2x a perfect square we need to add the term { 2 / (2*1) }^2

which equals 1.

Add 1 to both sides: x^2 + 2x = 8

add 1 to both sides: x^2 + 2x + 1 = 8 + 1 (x + 1)^2 = 9

Take square root on both sides: x + 1 = +/- 3 x = +3 - 1 or x = -3 - 1 x = 2 or x = -4

6 0

3 years ago

Need help pleaseI was bad at math in school so lwant to learn

aleksklad [387]

The probability of an event is expressed as

$Pr(\text{event) =}\frac{Total\text{ number of favourable/desired outcome}}{Tota\text{l number of possible outcome}}$

Given:

$\begin{gathered} \text{Red}\Rightarrow2 \\ \text{Green}\Rightarrow3 \\ \text{Blue}\Rightarrow2 \\ \Rightarrow Total\text{ number of balls = 2+3+2=7 balls} \end{gathered}$

The probability of drwing two blue balls one after the other is expressed as

$Pr(\text{blue)}\times Pr(blue)$

For the first draw:

$\begin{gathered} Pr(\text{blue) = }\frac{number\text{ of blue balls}}{total\text{ number of balls}} \\ =\frac{2}{7} \end{gathered}$

For the second draw, we have only 1 blue ball left out of a total of 6 balls (since a blue ball with drawn earlier).

Thus,

$\begin{gathered} Pr(\text{blue)}=\frac{number\text{ of blue balls left}}{total\text{ number of balls left}} \\ =\frac{1}{6} \end{gathered}$

The probability of drawing two blue balls one after the other is evaluted as

$\begin{gathered} \frac{1}{6}\times\frac{2}{7} \\ =\frac{1}{21} \end{gathered}$

The probablity that none of the balls drawn is blue is evaluted as

$\begin{gathered} 1-\frac{1}{21} \\ =\frac{20}{21} \end{gathered}$

Hence, the probablity that none of the balls drawn is blue is evaluted as

$\frac{20}{21}$

8 0

1 year ago

Sela's piano lesson starts at 4:45 pm. The lesson is 30 minutes long when does her lesson end.

zavuch27 [327]

Answer:

her lesson ends at 5:15

Step-by-step explanation:

if you subtract 30 from 45 you get the time left over that will go toward the next hour (5 o'clock)

3 0

2 years ago

Inequalities help please

Bingel [31]

The answer is B x is greater than -5 and less than 3

8 0

3 years ago

71% as a fraction in simplest form

maks197457 [2]

71/100 71 is aprime number, there fore it can only equally be divided by (whole numbers) itself and 1

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4 years ago

Read 2 more answers