Ask question

Ask question

All categories

sertanlavr [38]

2 years ago

8

A standard I.Q. test produces normally distributed results with a mean of 104 and a standard deviation of 16 for 52,000 students

in grade 12 in the province. Approximately how many of these people would have I.Q.s below 76?
2,127

4,170

23,915

2,083

1 answer:

Anastasy [175]2 years ago

5 0

Z = (76 - 104)/16
z = -1.75
4%
.04 * 52,000 = 2083

You might be interested in

Alejandro made an error in the steps below when determining the equation of the line that is perpendicular to the line 4x – 3y =

vazorg [7]

The slope of the line given its equation is calculated through, m = -A / B. The slope of the given line is 4/3. The line perpendicular to it has the slope of -3/4. The slope-point form of the equation is,
y - y1 = m(x - x1)
where m is the slope and x1 and y1 the abscissa and ordinate of the point, respectively.
Substituting the values above,
y --2 = (-3/4)(x - 3)

Simplifying the equation gives 3x + 4y = 1.

4 0

3 years ago

Read 2 more answers

Pls help me <br> Here is triangle ABC:<br> No links pls

SOVA2 [1]

Answer:

$Given: AC=1$

∠A=0

$Cos0=\frac{B}{H} =\frac{AB}{AC}$

$Cos0=\frac{AB}{1}$

$AB=Cos0$

<u>-------------------------</u>

hope it helps...

have a great day!!

6 0

2 years ago

Read 2 more answers

A six-sided cube is tossed and a coin is flipped.

Anika [276]

Rolling an even number would be 1/2 possibility while flipping tails would be 1/2 possibility hence the answer is 1/4

7 0

3 years ago

Read 2 more answers

At its highest point, the elevation of a county is 5764 feet above sea level. At its lowest point, the elevation of the county

lianna [129]

Answer:

Can you tell me the answer choices?

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

A pizzeria sells two types of pizza for lunch: The pepperoni pizza costs $8.50 and the cheese pizza costs $6.00. In one day they

Yakvenalex [24]

7 cheese pizzas and 38 pepperoni pizzas were sold.

Step-by-step explanation:

Given,

Cost of one pepperoni pizza = $8.50

Cost of one cheese pizza = $6.00

Total pizzas sold = 45

Total worth = $365

Let,

x be the number of pepperoni pizzas sold.

y be the number of cheese pizzas sold.

According to given statement;

x+y=45 Eqn 1

8.50x+6y=365 Eqn 2

Multiplying Eqn 1 by 6

$6(x+y=45)\\6x+6y=270\ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2

$(8.50x+6y)-(6x+6y)=365-270\\8.50x+6y-6x-6y=95\\2.50x=95$

Dividing both sides by 2.50

$\frac{2.50x}{2.50}=\frac{95}{2.50}\\x=38$

Putting x=38 in Eqn 1

$38+y=45\\y=45-38\\y=7$

7 cheese pizzas and 38 pepperoni pizzas were sold.

Keywords: linear equation, subtraction

Learn more about linear equations at:

#LearnwithBrainly

8 0

2 years ago