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3 years ago

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Mathematics

2 answers:

Shalnov [3]3 years ago

7 0

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Dovator [93]3 years ago

4 0

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if iq scores are normally distrubuted with a mean over 100 and standard deviation of 17 and if the population of the world is 6,

icang [17]

Answer:jenlso helmaiv eksin

Step-by-step explanation:

8 0

3 years ago

SURFACE AREAS - PYRAMIDS?

Bond [772]

The total surface area consists of the base area and the surface area (the area of all lateral faces). The base is a hexagon with side a=3 cm.

$A_{hexagon}=6A_{triangle}=6\cdot \dfrac{1}{2} \cdot \dfrac{a^2\sqrt{3}}{4} =\dfrac{3}{4} \cdot 3^2\cdot \sqrt{3}=\dfrac{27\sqrt{3}}{4}$ sq. cm.

Each lateral face is an isosceles triangle with height h=12 cm and base a=3 cm. The area of one such lateral triangle is

$A_{lateral}=\dfrac{1}{2}\cdot h\cdot a= \dfrac{1}{2}\cdot 12\cdot 3=18$ sq. cm.

Then the total surface area is:

$A_{total}= \dfrac{27\sqrt{3}}{4} +6\cdot 18=\dfrac{27\sqrt{3}}{4} +108=11.7+108=119.7$ sq. cm.

Answer: 119.7 sq. cm.

7 0

4 years ago

Pls help solve question 3

Lelu [443]

Answer:

If m is the midpoint of ab it means am is equal to mb

am = 3x + 8 and mb = 6x-4

and ab = am + mb

first find the value of x by using am = mb

3x + 8 = 6x - 4

8 + 4 = 6x - 3x

12 = 3x

x = 4

ab = 3 (4) + 8

= 12 + 8 = 20 = mb

ab = am + mb

= 20 + 20

so, the value of ab is 40

4 0

3 years ago

Write as an algebraic expression: Five times

Alenkasestr [34]

Given:

The statement is "Five times the difference of the cube of y and the square of x".

To find:

The algebraic expression for the given statement.

Solution:

We know that,

Cube = Power 3

Square = Power 2

Difference = Minus (-)

Times = Multiplication (×)

Now,

Cube of y = $y^3$

Square of x = $x^2$

Difference of the cube of y and the square of x = $y^3-x^2$

Five times the difference of the cube of y and the square of x is:

Required expression = $5(y^3-x^2)$

Therefore, the correct option is C. The required algebraic expression for the given statement is $5(y^3-x^2)$ .

5 0

3 years ago

The circumference of a circular field is 216.66 yards. What is the diameter of the field? Use 3.14 for it and do not round your

Levart [38]

Answer:

69 yards

Step-by-step explanation:

The circumference is $=\pi D$

The diameter is $\frac{C}{\pi }$

$\frac{216.66}{3.14}=69yds$

If the diameter is 69 then then the radius is 34.5

$r= \frac{d}{2} \\or\\r= d*\frac{1}{2}$

Hope this helps you!

Have a nice day!

3 0

4 years ago