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Alex777 [14]
3 years ago
15

What is the discriminant 3g^2+10= -15g

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
7 0
\bf 3g^2+10=-15g\implies 3g^2+15g+10=0
\\\\\\
\begin{array}{llcccll}
& 3g^2& +15g& +10\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array}
\\\\\\
discriminant\implies b^2-4ac\implies 15^2-4(3)(10)
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For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of sc
Shkiper50 [21]

Answer:

a) Scores of 2 and higher are significantly high

b) Scores of -2 and lower are significantly low

c) Scores between -2 and 2 are not significant.

Step-by-step explanation:

Mean = 0

Standard deviation = 1

a. significantly high​ (or at least 2 standard deviations above the​ mean).

2 standard deviations above the mean is:

0 + 1*2 = 2

So scores of 2 and higher are significantly high

b. significantly low​ (or at least 2 standard deviations below the​ mean).

2 standard deviations below the mean is:

0 - 1*2 = -2

So scores of -2 and lower are significantly low

c. not significant​ (or less than 2 standard deviations away from the​ mean).

2 standard deviations above the mean is:

0 + 1*2 = 2

2 standard deviations below the mean is:

0 - 1*2 = -2

So scores between -2 and 2 are not significant.

3 0
3 years ago
Need the value of (50x2) + (15x2)
prisoha [69]

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7 0
3 years ago
Read 2 more answers
Solve the inequality and then graph it <br> t-3 &lt; -2
SSSSS [86.1K]

Hi there!

<em><u>Answer:</u></em>

<em><u>t<1</u></em>

<em><u>*The answer must have a positive sign.*</u></em>

Step-by-step explanation:

First, you add by 3 from both sides of an equation.

t-3+3

And then, you add/subtract from left too right.

(-2)+3=-1

It change negative to positive sign.

<em><u>Final answer is t<1</u></em>

Hope this helps!

-Charlie

Have a nice day! :)

:D

7 0
3 years ago
Suhal buys a total of 24 books from a charity shop. Hardbacks cost £2 and paperbacks cost £1.50. He spends £43.50. Let x represe
laiz [17]
Hello, sorry if this seems a bit odd, it’s a common method though. Hope you can understand this. Thanks

4 0
2 years ago
Can u please answer this question ASAP
REY [17]
Set both y’s equal to each other.

2x-1 = 3x+4
2x-3x = 4-(-1)
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x = -5

Plug x = -5 into any of the given equation. I will use the first one as an example.

y = 2x-1
y = 2(-5)-1
y = -11

Answer: (-5, -11)
4 0
3 years ago
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