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3 years ago

5(1+4r)- 8(4-r) simplify

Mathematics

2 answers:

kolezko [41]3 years ago

8 0

Answer: =28r−27

Step-by-step explanation:

elena-14-01-66 [18.8K]3 years ago

3 0

Answer:

= 25r - 32-r

Step-by-step explanation:

5(1+4r)-8(4-r)

= 5 x 5r - 32-r

= 25r - 32-r

If r was 2, (example),

= 25 x 2 - 32 - 2

= 50 - 30

= 20

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How much do subtract from 37/6 to make 6

choli [55]

37÷6
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3 years ago

Reasoning Graph the set of ordered pairs (0, 2). (1.4), (2,6). (3.8). Determine whether the relationship is a linear function Ex

polet [3.4K]

Answer:

No, it does not. See below.

Step-by-step explanation:

Lets find out the linear equation that passes trough (-2, 0) and (0, -6).

We know every linear equation has the form: y = mx + b

Where m is the slope on the curve and b the independent term.

We know that, given 2 points (x1,y1) and (x2,y2) we can find the slope m as:

m = (y2-y1)/(x2-x1)

In our case lets replace (x1,y1) and (x2,y2) by (-2, 0) and (0, -6) (notice it could be done in the inverse sense where (-2, 0) is (x2,y2) and (0, -6) is (x1,y1) ). So, our slope is:

m = [-6 - 0] / [0 - (-2)]

m = -6/2 = -3

So, we have a downward linear function with slope -3, this is:

y = -3x + b

Now, for finding b just replace any of the 2 points given in the equation. Lets replace (-2, 0):

0 = -3(-2) + b

0 = 6 + b

Subtracting 6 in both sides:

-6 = b

So, our independent term is -6 and the function is:

y = -3x - 6

Now lets see if this linear eqution passes trough (2,6). If it does, we can replace the values on the equation. Replacing x by 2:

y = -3(2) - 6 = = -6 - 6 = - 12

So, in our equation, we x is 2 y is -12, and not 6 as in the point (2,6). So, our equation does not passes trough (2,6)

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2 years ago

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Klio2033 [76]

Answer:

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Step-by-step explanation:

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2 years ago

There is a fire in the third floor of a building, 22 feet above the ground. The fire truck has a 16-foot tall ladder on top, and

Over [174]

Answer: Yes the ladder will reach the fire

Step-by-step explanation: Please refer to the attached diagram for details.

The fire is at point A, while the top of the truck is at point C. The fire is actually burning at 22 feet off the ground, but because the fire truck itself is already 6 feet off the ground, the point that would serve as the base of the building would be 16 feet from the third floor (which is 22 feet minus 6 feet). Hence, point A to point B is 16 feet. So we need to calculate if line AC (from the truck to the fire at the third floor, labeled as b) shall equal the length of the ladder which is 16-foot long.

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Sin 75 = opposite/hypotenuse

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3 years ago

Write a brief summary about similar figures

Darina [25.2K]

Similar figures are the same shape but not the same size. you can find out the scale by using parallel lines.

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2 years ago

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5(1+4r)- 8(4-r) simplify​

5(1+4r)- 8(4-r) simplify