MATHEMATICS MIDDLE SCHOOL

A TV has a listed price of $877.99 before tax. If the sales tax rate is 7.5%, find the total cost of the TV with sales tax included.

Answers

Answer 1
Answer:

Answer:

The tax, 9.5% of $671.95, is found by multiplying. Then we add that to the listed price to get the price out the door...

 

.095(671.95) = $63.84

671.95 + 63.84 = $735.79

Step-by-step explanation:
Answer 2
Answer: $735.39 is the answer

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The perimeter of a rectangle is 50 inches. The width of the rectangle is 10 inches. What is the length of the rectangle?

Answers

the answer is 15 inches. because the opposite side to 10 inches is the same we can subtract 20 from 50. that leaves us with 30. divide that by two and you get 15.
First, add 10 and 10 because you know that is the length of two sides (because they're equal). When you do that, you get 20. 50-20=30. Then you need to divide by two to find the length of 1 of the remaining sides. When you do that you get 15. So the length is 15 inches.

Recall that the length a spring  streches varies directly with the amount of weight attached to it. a certain spring stretches 5cm when a 10-gram weight is attached  write a direct variation equation relating the weight x and the amount of stretch y.

Answers

Direct variation is y=kx

In this case, y=1/2x. The spring stretches 5 cm for every 10 grams. Therefore if y=5 and x=10, k would have to be 1/2. That's how we come up with our direct variation model.
This\ spring\ stretches\ in\ proportion\ to\ weight,\ that\ is,\ for\ every \n 10\ grams\ of\ weight\ the\ amount\ of\ stretch\ is\ 5\ cm.\n \nx\ [g]\ \ \ |\ \ 10\ \ |\ \ 20\ \ |\ \ 30\ \ |\ \ 40\ \ |...|\ \ \ a\ \ \ |\n------------------\ny\ [cm]\ |\ \ 5\ \ \ |\ \ 10\ \ |\ \ 15\ \ |\ \ 20\ \ |...|\ \ (1)/(2) a\ \ |\n\na\ variation\ equation\ is\ y= (1)/(2) x

Mrs.Brown biked 35 miles in 2.5 hours. How many miles could she bike in 3 hours at the same rate

Answers

35 divided by 2.5 is 14, so she biked 14 miles in 1 hour. So 14*3= 42

She can bike 42 miles in 3 hours.

What is a common denominator for 3 and 26. Thanks for the help. 6th grade math.

Answers

There are no common denominator for 3 and 26. 
42 because 26x2=42 and 3x14=42

Use product rule to calculate the derivative of: 3
{x}^(2)
.(2x-1)​

Answers

Answer:

18x² - 6x

Step-by-step explanation:

Differentiate using the product rule, that is

y = f(x)g(x), then

(dy)/(dx) = f(x)g'(x) + g(x)f'(x)

here

f(x) = 3x² ⇒ f'(x) = 6x

g(x) = 2x - 1 ⇒ g'(x) = 2, thus

(d)/(dx)(3x²(2x - 1)

= 3x² × 2 + 6x(2x - 1)

= 6x² + 12x² - 6x

= 18x² - 6x

I need help to this problem very difficult

Answers

1. j || k and angle 1 = angle 3. 1. Given

(Those are the givens, no surprise there.)

2. angle 1 = angle 2. 2. If the lines are ||, then corresponding angles are congruent

j and k are parallel, l transverse so 1 and 2 are congruent corresponding angles.

3. angle 2 = angle 3 3. Substitution

We substitute angle 2 in for angle 1 in the other equation. This might also be called the transitivity of equality.

4. l || m 4. If alternate interior angles ...

We have congruent alternate interior angles of a transversal, so parallel lines.

Answers: 2 1 4 3

i think 4 goes to one of the ones at the bottom
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