If you have 75 questions how many question will you need to get correct to get a 90%

68 Questions

Step-by-step explanation:

When using the symbol % (percent), it means that percent of 1. So for example: 90% = 0.9 because 90/100 simplifies to 9/10, which is also 0.9.

In this problem, the question basically is: What is 90% of 75? The math equation to use would be: 75×0.9.

   75

x   .9

67.5

Doing the math, 90% of 75 is 67.5. In the problem, we don't know if you can get a half-credit for a problem, so we have to round 67.5 to the nearest whole number. The number 67.5 rounds up to 68.

So, if you have 75 questions, you need to get correct 68 questions in order to get a 90%.

Hope this answer helps you!

If you don't mind, please mark my answer as brainliest! Thanks!

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 ☺