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3 years ago

The temperature dropped 14.4 over a period

Mathematics

2 answers:

Dominik [7]3 years ago

8 0

Answer:

The Answer is 3.2 each hour

nignag [31]3 years ago

3 0

Answer:

Hello!!

If a temperature dropped 14.4 degrees over a period of 4.5 hours then the average change in temperature each hour was 3.2.

Step-by-step explanation:

$14.4$ ÷ $4.5=3.2$

Hope this helps!!

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Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the original price of the

xxTIMURxx [149]

Answer:

Q1) Final cost = y*0.85*1.05

Q2) Perimeter = 0.1*x - 16

Q3) One over five ( m - 100)

Step-by-step explanation:

We are given three question as follows:

Q1) Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the original price of the DVD. Write an expression that can be used to determine the final cost of the DVD.

Solution:

Note: The effect of each percentage on original price is as follows, where y is the original price of the DVD:

Discount of 15 % = Price reduced by 0.15*y

Sales Tax of 5% = Price increased by 0.05*y

- The resulting prices from each percentage is:

Amount left after discount = y - 0.15*y = 0.85*y

Amount after tax = y + 0.05*y = 1.05*y

- The factors of each affect are:

Factor of discount = 0.85

Factor of Tax = 1.05

Hence, The factors are multiplied by the original cost to get the combined effect as follows:

Answer: Final cost = y*0.85*1.05

Q2) Write an expression for the perimeter of the triangle shown below: A triangle is shown with side lengths labeled 0.5*x + 9, 3x, and - 3.4*x - 25.

Solution:

The perimeter of the triangle is the sum of all 3 sides given:

Perimeter = (0.5*x + 9) + (3x) + ( -3.4*x - 25 )

Perimeter = (0.5*x + 3x - 3.4x) + ( 9 - 25 )

Answer: Perimeter = 0.1*x - 16

Q3) Which expression is equivalent to one over five*m − 20?

Solution:

- Re-write expression:

(1 / 5)*m - 20

Take LCM of the denominator:

(m - 100) / 5

Answer: One over five ( m - 100)

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4 years ago

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Irina-Kira [14]

Addition property of equality.

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3 years ago

Help please need help please

lapo4ka [179]

Answer:

The 1st y with the 4th card

The 2nd y with the 3rg card

The 3th y with the 2nd card

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3 years ago

Find the inverse please tell me where to put the dots thanks

aev [14]

Answer:

Draw a line segment from (-7, -2) to (3, 8)

See the diagram below.

You do not have to draw the blue dashed line. It's there to show how the points reflect over.

=========================================================

Explanation:

The inverse will have us swap x and y. The point (x,y) becomes (y,x)

The endpoint (-2, -7) becomes (-7, -2)

Also (8,3) moves to (3, 8)

Visually, these points are being reflected over the line y = x to form the inverse. We only need to worry about the endpoints because 2 points is the minimum needed to form a straight line.

Check out the diagram below. The red segment is the inverse. The blue dashed line is the line y = x. You don't have to plot this line as it's just a visual tool to see what's going on. Your teacher likely will only want the red segment.

Since the original segment is parallel to y = x, the inverse is also parallel to the mirror line. All three lines are parallel.

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2 years ago

The ratio of sheep to the total number of animals on a local farm is 2:5.

Lina20 [59]

Answer:

40%

Step-by-step explanation:

2:5 is equal to 4:10 or 40%.

7 0

3 years ago

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