Answer:
(a) 
(b) 7 hours.
Step-by-step explanation:
(a) Let x be the number of hours and y is the total cost.
We have been given that Beatrice and her friends charge $8 per hour of babysitting, so the charges for x hours of babysitting will be 8x.
As they also charge a mandatory $5 per day fee for each child for snacks, so the total charges for babysit each day will be charges for x hours of babysitting plus mandatory charge.
We can represent this information in an equation as:

Therefore, the equation
represents the total cost of using Beatrice’s babysitting service each day.
(b) To find the number of hours Beatrice babysit the daughter, we will substitute y = 61 in our equation and solve for x.

Let us subtract 5 from both sides of our equation.


Let us divide both sides of our equation by 8.


Therefore, Beatrice babysit 7 hours the daughter.
Expression for part c is missing.
Answer:
number 1 is 5x+8y+10
Step-by-step explanation:
Let's simplify step-by-step.
10y+3x+10+x+x−2y
=10y+3x+10+x+x+−2y
Combine Like Terms:
=10y+3x+10+x+x+−2y
=(3x+x+x)+(10y+−2y)+(10)
=5x+8y+10
Answer:
=5x+8y+10
You can add 5.6 and 5.9 which is 11.5 x 8 = 92 then divide that by 2 and you have 46
Bottle 1 = $1.92 & 12 ounces
Bottle 2 = $2.40 & 16 ounces
Bottle 1
If 12 ounces costs $1.92, to determine the price of 1 ounce we divide $1.92 by 12.
$1.92 ÷ 12 = $0.16 per ounce for bottle 1.
Bottle 2
If 16 ounces costs $2.40, to determine the price of 1 ounce we divide $2.40 by 16.
$2.40 ÷ 16 = $0.15 per ounce for bottle 2.
Therefore we can determine that Bottle 2 is cheaper per ounce than Bottle 1.