Answer:

Step-by-step explanation:
Given

Required
Factorize

Expand each term

Factor 6 out of the expression

Hence:

X is the amount of money that each will pay
2x+(21.50*20/100) =21.50
2x+4.3=21.50
2x=17.2
x=8.6$ will pay each person
So it gives you the "= 210" part of it so you just need to figure out how to write "40% of a number is added to the number"
the questions already tells you that "the number" is "x"
so that means "40% of x is added to x"
instead of writing "add" you can replace it with a plus sign "+"
(40% of x) + x
another way to write 40% of x is 0.40x
so your equation is .4x + x = 210
Debnil have 2 tablespoons to salt.
Step-by-step explanation:
Given,
Number of teaspoons of salt = 6
Ratio of teaspoons to tablespoons = 3:1
Let,
x be the number of tablespoon of salt for 6 teaspoons.
Ratio of teaspoons to tablespoons = 6:x
Using proportion
Ratio of teaspoons to tablespoons :: Ratio of teaspoons to tablespoons

Product of mean = Product of extreme

Dividing both sides by 3

Debnil have 2 tablespoons to salt.
Keywords: ratio, proportion
Learn more about proportion at:
#LearnwithBrainly
The equation for finding the equation of an arithmetic sequence is an=a1+(n-1)d, where n is the input for the sequence, a1 is the first term, and d is the difference between each term.
a1= 1/4
d= 1/4
an= 1/4 + (n-1)(1/2) - First you need to distribute the 1/2 to both the n and -1 to get: an= 1/4 + 1/2n -1/2.
Then you need to add like terms (1/4-1/2) to get an=1/2n-1/4. Hope this helps!