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Mathematics

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harina [27]3 years ago

5 0

Answer:

Qu. 8 = A (50) = 25w as 125w x 125l = Area ; this because perimeter 500ft would always be a 3:5 ratio to the larger area. Therefore perimeter is 125+125 +125 +125 and = 500ft. However we can prove if 125 is any length or width then A(50)= 1/5 = 25 Qu 9)= I think last 2 are a function. Qu 10) Answer B is correct.

Step-by-step explanation:

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3 years ago

Bob has two weekend jobs last weekend he made a total of $77 after working as a cashier for 5 hours and delivering newspapers fo

OlgaM077 [116]

Answer: $9 per hour at his job as a cashier and $8 per hour at his job delivering newspapers.

Step-by-step explanation:

1. Let's call the amount he got paid per hour at his job as a cashier: $x$ .

Let's call the amount he got paid per hour at his job delivering newspapers: $y$ .

2. Keeping on mind the information given in the problem above, you can make the following system of equations:

$\left \{ {{5x+4y=77 \atop {6x+3y=78}} \right.$

3. You can solve it by applying the Substitution method, as following:

- Solve for one of the variables from one of the equations and substitute it into the other equation to solve for the other variable and calculate its value.

- Substitute the value obtained into one of the original equations to solve for the other variable and calculate its value.

4. Therefore, you have:

$5x+4y=77\\5x=77-4y\\x=\frac{77-4y}{5}=15.4-0.8y$