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tamaranim1 [39]
2 years ago
11

Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Mathematics
1 answer:
Aliun [14]2 years ago
8 0

Answer:

1/2x^2-2x

Step-by-step explanation:

x^2+2x+1/2x^4+2x^3-2x^2-2x

(x+1)(x+1)/2x(x+1)(x+1)(x+1)

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some psychologists believe that a genius should be defined as anyone having an IQ over 140. If IQ scores are normally distribute
denis23 [38]

Answer:

61,239,550

Step-by-step explanation:

We let the random variable X denote the IQ scores. This would imply that X is normal with a mean of 100 and standard deviation of 17. We proceed to determine the probability that an individual chosen at random from the population would be a genius, that is;

Pr( X>140)

The next step is to evaluate the z-score associated with the IQ score of 140 by standardizing the random variable X;

Pr(X>140)=Pr(Z>\frac{140-100}{17})=Pr(Z>2.3529)

The area to the right of 2.3529 will be the required probability. This area from the standard normal tables is 0.009314

From a population of 6,575,000,000 the number of geniuses would be;

6,575,000,000*0.009314 = 61,239,550

6 0
3 years ago
Read 2 more answers
8% of 70 is what number? (please explain)
Bingel [31]
Do a proportion
8/100= x/70
Cross multiply and divide
70 x 8= 560
560 divided by 100= 5.6
Answer is 5.6

You also could have done .08 x 70 which is also 5.6
7 0
3 years ago
Use the net as an aid to compute the surface area of a triangle pyramid with an equilateral triangle base
murzikaleks [220]

Answer:

106 ft 2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
7. The value of y varies directly with x, and y = 8 when x = 2.<br> Find y when x = 10.
lesya692 [45]
Y= 40 explanation don’t want to just trust me it’s 40
4 0
2 years ago
Find the function value f (6) if f(x) = 4x-10
Olenka [21]
So first you plug 6 into the equation which is 4(6)-10.
Using PEMDAS, you solve what’s in the parenthesis first and you get 24-10.
24-10=14
f(6)=14
8 0
3 years ago
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