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Mama L [17]
3 years ago
6

Evaluate the expression when a=7 and x=-2.

Mathematics
1 answer:
Kisachek [45]3 years ago
6 0

x-3a

Plug in the values a=7 and x=-2

=-2-3(7)

=-2-21=-23

The answer is -23.

Let me know if you need any clarifications, thanks!

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One large bubble separates into four small bubbles so that the total area of the small bubbles is equal to the area of the large
anzhelika [568]

Answer:

10 cm.

Step-by-step explanation:

We'll begin by calculating the area of the small bubble. This can be obtained as follow:

Radius (r) = 5 cm

Area (A) =?

Since the bubble is circular in nature, we shall use the formula for area of circle to determine the area of the bubble. This is illustrated below:

A = πr²

A = π × 5²

A = 25π cm²

Next, we shall determine the total area of the small bubbles. This can be obtained as follow:

Area of 1 bubble = 25π cm²

Therefore,

Area of 4 bubbles = 4 × 25π cm²

Area of 4 bubbles = 100π cm²

Finally, we shall determine the radius of the large bubble. This can be obtained as follow:

Area of large bubble = total area of small bubbles = 100π cm²

Radius (r) =?

A = πr²

100π = πr²

100 = r²

Take the square root of both side

r = √100

r = 10 cm

Thus, the radius of the large bubble is 10 cm

5 0
2 years ago
Write an equation of the line that passes through (5,9) and is perpendicular to the line y=-1/3x+1
777dan777 [17]
Perpendicular = opposite sign and reciprocal slope
Slope would be 3
Y = 3x + b, plug in point
9 = 3(5) + b, b = -6
Solution: y = 3x - 6
7 0
3 years ago
The calculation of property tax is based on the
Tresset [83]
The assessment rate is a uniform percentage and varies by tax jurisdiction, and could be any percentage below 100%. After getting the assessed value, it is multiplied by the mill levy to determine your taxes due. For example, suppose the assessor determines your property value is $500,000 and the assessment rate is 8%.
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3 years ago
What is the scale factor?
Fed [463]

Answer:

2

Step-by-step explanation:

it literally doubles in size

5 0
2 years ago
Read 2 more answers
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inessss [21]

Answer:

Use https://www.bartleby.com/  it has helped me out a lot . Its actual tutors/teachers who answer your questions in about 30 minutes :)

Step-by-step explanation:

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3 years ago
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