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mestny [16]
2 years ago
15

A psychology test has personality questions numbered 1,2,3, intelligence questions numbered 1,2,3,4, and attitude questions numb

ered 1,2. If a single question is picked at random, what is the probability that the question is an intelligence question OR has an odd number?
Mathematics
1 answer:
In-s [12.5K]2 years ago
6 0

Answer:

7/9.

Step-by-step explanation:

There are a total of 9 questions,

The  odd numbers are 1,1,1,3,3 =  a total of 5 .

Probability (it is an odd number) = 5/9.

Probability (It is an intelligence question of even number) = 2/9.

Required probability = 5/9 + 2/9

= 7/9.

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What should be added to a²-2ab+b² to get a²-ab-2b² ​
dybincka [34]

<u>SOLUTION</u><u>:</u>

<u>what should be added to a²-2ab+b² to get a²-ab-2b² </u>

let the added no is P

  • \pmb{P+(a^2-2ab+b^2)=(a^2-ab-2b^2) }

  • \pmb{P=(a^2-ab-2b^2)-(a^2-2ab+b^2) }

  • \pmb{P=a^2-ab-2b^2-a^2+2ab-b^2 }

  • \pmb{P=ab-3b^2 }

\therefore{\pmb{ab-3b^2 }} should be added to a²-2ab+b² to get a²-ab-2b²

5 0
2 years ago
Write the slopes intercept form of the equation of the line through the given points.
Anika [276]
Slope intercept form
y=mx+b
m=slope
b=yintercept

slope for the line passing through the points (x1,y1) and (x2,y2) is
(y2-y1)/(x2-x1)

given
(2,-2) and (2,-3)
slope=(-3-(-2))/(2-2)=(-1)/0=undefined

y=undefinedx
this means that the equation is x=something
we see
(x,y)
(2,-2)
(2,-3)
x=2 is the equation
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8 0
3 years ago
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Zina [86]

Answer: The area of Figure ABCDE is 79.5 square units.

Step-by-step explanation:

<em>Triangle ABC is the top triangle of Figure ABCDE.</em>

<u>Triangle ACD is the triangle on the right of Figure ABCDE.</u>

Triangle AED is the triangle on the bottom left of Figure ABCDE.

So, we need to add <em>23.85</em>, <u>29.4</u>, and 26.25 to get the area of Figure ABCDE!

23.85 + 29.4 + 26.25 = 79.5

4 0
2 years ago
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eimsori [14]

Answer:

C

Step-by-step explanation:

We have the expression:

\sqrt{-100}

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=\sqrt{-1\cdot100}=\sqrt{-1}\cdot\sqrt{100}=i\sqrt{100}=10i

Therefore, our answer is C.

6 0
2 years ago
Evaluate [-1 -(-3) ] × (-4)​
7nadin3 [17]

Answer:

the answer is -8.

Step-by-step explanation:

hope this helps!

8 0
2 years ago
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