You went to lunch with your friend and the bill is $19.00 your lunch is $3.00 more than your friends. How much was your friends lunch?

f + 3 = 19; $8.00
3f + 2 = 19; $8.00
2f + 3 = 19; $8.00
2f - 3 = 19; $8.00

Mark weighs 74 pounds. together he and his sister weigh 6 pounds more than 3 times the weight of his sister, what is the weight, W, of marks sister.

74 + w = 3w; 37lb
74 + w = 6 = 3w; 18.5lb
74 + w = 3w + 6; 34lb
74 + w = 3w - 6; 40lb

Chris received and $90.00 check for his birthday. The check was for 5 more than twice the amount of the check that he got last year for his birthday. how much money did Chris receive last year for his birthday.

$85.00
$42.50
$50.50
$47.50

I have no idea what the answers for these are?

f + f+3 = 19

or
2F + 3 = 19

74 + w -6 = 3 w
or
74+w = 3w+6
that means 2w=74-6 = 68 or w = 34

90-5 = 2c
85 = 2c
c = 42.5

Ok thank you so so much Damon. :)

You are welcome.

the last two are

2. C
3.B

Thx you helped me so much!

@boo is right

To solve these questions, we can use algebraic equations to represent the given information and then solve for the unknown variables. Let's break down each question:

1. You went to lunch with your friend, and the bill is $19. Your lunch is $3 more than your friend's. How much was your friend's lunch?
To solve this, we can represent your friend's lunch cost as "f" (unknown variable). Since your lunch is $3 more, your lunch cost will be "f + 3". The total bill is $19. So we can set up the equation: f + (f + 3) = 19. Simplifying this equation will give us the answer.

2. Mark weighs 74 pounds, and together he and his sister weigh 6 pounds more than 3 times the weight of his sister. What is the weight of Mark's sister?
Let's represent the weight of Mark's sister as "W" (unknown variable). The total weight of Mark and his sister is 6 pounds more than 3 times his sister's weight. We can set up the equation: 74 + W = 3W + 6. Simplify and solve for "W".

3. Chris received a $90 check for his birthday, which is 5 more than twice the amount of the check he got last year. How much money did Chris receive last year for his birthday?
Let's represent the amount Chris received last year as "x" (unknown variable). The check he got this year is 5 more than twice the amount he got last year. So we can set up the equation: 2x + 5 = 90. Simplify and solve for "x".

By solving these equations, we can find the answers to the questions.