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3 years ago

Help me please,Thanks

Mathematics

1 answer:

Mkey [24]3 years ago

3 0

Volume is height times width times length so to find the height you just do the opposite. Using h as height we put the equation like so...

43.875=5 * 3.9 * h

Now divide and we get
2.25=h

Your answer is 2.25

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How would the expression x^3-8 be written using difference of cubes

ludmilkaskok [199]

we can use formula

$a^3-b^3=(a-b)(a^2+ab+b^2)$

we can compare

we get

a=x

b=2

now, we can plug that in formula

and we get

$x^3-2^3=(x-2)(x^2+2x+2^2)$

now, we can simplify it

$x^3-8=(x-2)(x^2+2x+4)$ ...........Answer

4 0

4 years ago

Read 2 more answers

What is the sum of a geometric series Sn=a+ar+ar2+ar3+…+arn-2+arn-1?

algol13

Answer:

$Sn= \frac{a(1-r^n)}{1-r}$

Step-by-step explanation:

A geometric sequence is a sequence such that any element after the first is obtained by multiplying the preceding element by a constant called the common ratio which is denoted by r. The common ratio (r) is obtained by dividing any term by the preceding term.

from the given expression

the given data are

first term a1= $a$

second term a2= $ar$

third term a3= $ar^2$

the common ratio is expressed as $r=\frac{a2}{a1}$ = $\frac{ar}{a} = r$

Sum of Terms in a Geometric Progression

Finding the sum of terms in a geometric progression is easily obtained by applying the formulas:

$Sn= \frac{a1(1-r^n)}{1-r}$

nth partial sum of a geometric sequence substituting the values of a1=a and the common ratio= r we have

$Sn= \frac{a(1-r^n)}{1-r}$

4 0

3 years ago

There are 20 children in the cast of a class play, and 8 of the children are boys. of the boys, 4 have a speaking part in the pl

likoan [24]

The probability that a child with a speaking part is chosen randomly would be 2:5.

6 0

3 years ago

Lauren is going to invest in an account paying an interest rate of 3.4%

zzz [600]

Answer:

Step-by-step explanation:

7 0

3 years ago

Can someone help me plz am stuck on this.

chubhunter [2.5K]

First Question

circumference = pi * diameter

diameter = circumference/pi = 94.2 in./3.14 = 30 in.

The wheels have a 30-inch diameter.
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Second question

The area of a circle: area = pi * r^2

radius = diameter/2 = 94.2 in./2 = 47.1 in.

area = pi * r^2 = 3.14 * 47.1 in. * 47.1 in. = 6966 in.^2

Answer: 6966 in.^2
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Third question

The piece of felt has a width equal to the diameter of the wheel. The length has to be the same as 4 diameters.

4 * 94.2 in. = 376.8 in.

Answer: 376.8 in.

6 0

4 years ago