Select the correct text. Regina's teacher recently gave her a homework assignment on solving equations. Since she has been thinking about saving for a new cell phone,
she decided to use the assignment as an opportunity to model a savings plan.
She created this equation to model the situation. In It, y represents the total amount saved for the new cell phone, 74 is the amount of money
she has now, 40 is the amount of money she saves each month for the phone, and x represents the number of months since she started saving
a regular amount
74 + 40x=y
She then solved the equation to determine how many months she'd need to save to have enough to purchase the new cell phone. Review her
work, and select the error.
1: given
Justification
Step 1:
74 + 40x=y
2: subtraction property of equality
Step 2: 74 + 40x - 74 = y - 74
Step 3:
3: simplification
40x = y-74
40: ý- 74
4: multiplication property of equality Step 4;
40 = 40
S: simplification
₂- 74
Step 5:
x=40
6: substitution, y = 834
834 - 74
7: simplification
Step 6:
40
Step 7:
x = 19
Docet
Nast
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6hryt%4578855

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.

sorry man i accidentally pressed yes my bad

step-by-step explanation:

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 ☺