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3 years ago

How many millimeters equal 1942 cm 3?

Mathematics

1 answer:

DerKrebs [107]3 years ago

7 0

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Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students

VMariaS [17]

Answer: There are 20 students and 4 students are not here today.

Step-by-step explanation:

If the number of students = 4

Let the number of students be 'x'.

Fraction of students absent = $\dfrac{x}{4}$

If the number of students = 5

Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

$\dfrac{x}{4}-1$

According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

3 0

3 years ago

6^7/6^5 in index form<br>help me

brilliants [131]

Answer:

12^12

Step-by-step explanation:

can u please help me

7 0

3 years ago

Solve: x - 1 (x - 1)² + ax - a.

borishaifa [10]

Step-by-step explanation:

<h2><u>Given :-</u></h2>

x-1-(x-1)²+ax-a

Factorize the expression ?

<h2><u>Solution :-</u></h2>

Given expression is x-1-(x-1)²+ax-a

It can be written as

(x-1)-(x-1)²+(ax-a)

=> (x-1)-(x-1)(x-1)+a(x-1)

=> (x-1)[1-(x-1)+a]

=> (x-1)(1-x+1+a)

=> (x-1)(2-x+a)

<h2><u>Answer:-</u></h2>

x-1-(x-1)²+ax-a = (x-1)(2-x+a)

Hope this helps!!

4 0

3 years ago

What’s (e+3)(e+1) ??

natka813 [3]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

let's evaluate :

$(e + 3)(e + 1)$

${e}^{2} + e + 3e + 3$

${e}^{2} + 4e + 3$

5 0

3 years ago

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When a principal amount, P, is invested at an annual interest rate,r, and compounded n times per

romanna [79]

Answer:

Step-by-step explanation:

A = P( 1+r/n) ^ (nt)

P is the amount invested

r is the rate

n is the number of times per year the interest is compounded

t is the number of years

every 6 months is twice a year

so n is 2

8 0

3 years ago

Read 2 more answers