Rob and Mike are on a club swimming team.They are training for a statewide swimming meet that will be held in the end of summer. The table shows how many hours Rob and Mike spent at practice each week

practice time (in hours). | Swimmer|weekly|Monday-Friday|
Rob. | 35. | 25 Mike. | 30. | 20 Question: write a possible expression to show how many hours Rob and Mike spend at swim practice over a period of 10 weekends . include parentheses and brackets in your expression.

Please help
and thank you


Answer 1
Answer: Mike: 20+30/2= 25 on average 
25*10=250 hours. 

Rob: 35+25/2=30 on average 
30*10=300 hours. 

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1. In Tulsa, Oklahoma the sales tax is 7.9%. Ifyou buy an $850 television in Tulsa, how
much tax will you pay?



$ 67.15 tax

Step-by-step explanation:

the tax would be 7.9% of 850

turn ur percent to a decimal....and " of " means multiply

0.079 * 850 = 67.15 <==

How do you use equations to solve problems about area of Rectangles,Paralellograms , trapezoids and triangles


Each shape has a different formula for area. rectangles and parallelograms share the same formula, A=bh
Trapezoids formula is A= 1/2(b1 + b2)h
Triangles formula is A = 1/2bh
In all of these formulas, A means area, and h means the height of the shape. In the formulas for triangles and rectangles/parallelograms, b stands for the length of the base of the shape. 
In the trapezoids formula, b1 means base 1 and b2 means base two, as a trapezoid has two different bases.
After finding all of the variables for the formula of the shape you're solving for, plug all the numbers into your missing variables, and solve as normal.

best rentals charges a daily fee plus a mileage fee for renting its cars. barney was charged $159 for 3 days and 300 miles, while mary was charged $289 for 5 days and 600 miles. what does best rental charge per day and per mile?



Let charge per day be $x  and charge per mile be $y  


as per the given condition we have;

3x + 300y =159          .....[1]

5x + 600y = 289       .....[2]

Multiply equation [1] both sides by 5 we get;

5(3x+300y) = 5 \cdot 159

Using distributive property: a \cdot(b+c) = a\cdot b+ a\cdot c

15x+1500y = 795                 .....[3]

Multiply equation [2] by 3 both sides we get;

3(5x+600y) = 3 \cdot 289

Using distributive property: a \cdot(b+c) = a\cdot b+ a\cdot c

15x+1800y = 867                    .....[4]

Subtract equation [3] from [4] to eliminate x and solve for y;

15x+1800y-15x-1500y = 867 -795

Combined like terms;

300y = 72

Divide both sides by 300 we get;

y = (72)/(300)=0.24

⇒  y =$0.24 per mile.

Now substitute this value y in equation [1] to solve for x;

3x + 300(0.24) =159

3x + 72 =159

Subtract 72 both sides we get;

3x + 72 -72 = 159 -72


3x = 87

Divide both sides by 3 we get;

x = (87)/(3) = 29

Therefore, the best rental charges per day is, $ 29 and the charges per mile is, $0.24

What is the sum of an infinite geometric series if a1 = 5 and r = 1/3




Step-by-step explanation:

The first term is 5  and the ratio is 1/3

The formula for the sum of an infinite geometric series is

S = a1 / (1-r )

S = 5 / (1- 1/3)

   = 5 /(2/3)

   = 5 * 3/2

    = 15/2

    = 7.5

Final answer:

The sum of an infinite geometric series, with a first term of 5 and a common ratio of 1/3, is 7.5.


The question is about finding the sum of an infinite geometric series. The sum of an infinite geometric series can be found using the formula: S = a1 / (1 - r), where 'a1' is the first term and 'r' is the common ratio.

In this case, a1 is 5 and r is 1/3. Substituting the provided values into the formula, we get: S = 5 / (1 - 1/3), which simplifies to: S = 5 / (2/3) = 7.5.

So, the sum of this infinite geometric series is 7.5.

Learn more about sum of geometric series here:




The diagonal of a rectangle forms a right triangle with the length and the width. So the square of the diagonal is the length squared plus the width squared.

Explain why two problems have the same answer 800,000


Well, there are a lot of possibilities of why two questions can have the same answer. But you only said to list 2 so... 1. 1,000,000 - 200,000= 800,000 2. 6,400,000 divided by 8 = 800,000

Hope that helps! :D