In a language class, there are numerous students who multi-lingual. a) suppose that in a class. 50 students speak french, 35 students speak spanish, and 15 speak both french and spanish. if every student can speak at least french or spanish, how many students are in the class? b) suppose that in a class of 75 students, 50 students speak spanish and 15 can speak both spanish and french. if every student either speaks french or spanish, how many students can speak french? how many students can speak french but not spanish? c) in a class, there are 100 students who can speak only 1 language out of spanish, french, and chinese. there are 15 students who speak spanish and french only, 20 students who speak french and chinese only, and 15 students who speak chinese and spanish only. furthermore, there are 10 students who can speak all 3. if every student in class speaks at least one of the 3 languages above, how many students are present in class? hint: for problem (b) and (c), a good way to count the number of students would be to draw a venn diagram.

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.

263.5

step-by-step explanation:

7.75(17)= 131.75     < (2) = 263.5

the formula for converting absorbance to transmittance goes as:

a = log (1/t)  a = 2 - log(%t)  10^a = 1/t  t = 10^-a  %t = 100(10^-a)

so at the given value of a,   a = 1.5

%t = 100(10^-1.5)

%t = 3.16%