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3 years ago

Can someone explain this to me my teacher did not explain how to do these problems well.

Mathematics

1 answer:

NikAS [45]3 years ago

8 0

Answer:

64.8cm = x + y

The maximum sleeve length, x, plus the maximum allowable deviation, y, is 62.2cm = x - y

Step-by-step explanation:

The minimum sleeve length is the ideal length, x, minus the maximum allowable deviation, y.

64.8cm + 62.2cm = x + y + x - y

127.0cm = 2x

63.5cm = x

There are now two equations with two unknowns so both variable can be solved for.

Add the equations together and solve for the ideal length, x.

64.8cm = 63.5cm + y

1.3cm = y

Substitute x into either of the original equations and solve for y.

Result:

x = 63.5cm

±y = ±1.3cm

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Discount on LCD TV is $240. Sale Price is $1575.00 What was the list price?

Vikki [24]

Answer: The list price was $1815.00.

Step-by-step explanation: Given that the discount on a LCD TV is $240 and the sale price is $1575.00.

We are to find the list price.

The discount is given on the price that is listen on the LCD TV.

So, the list price will be equal to the sum of the sale price and the discount price.

Therefore, the required list price of the LCD TV is given by

$L.P.\\\\=\textup{sale price}+\textup{discount}\\\\=\$(1575.00+240.00)\\\\=\$1815.00.$

Thus, the list price was $1815.00.

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3 years ago

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elixir [45]

$78

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3 years ago

Use the method of completing the square to write the equation of the given parabola in this form:

siniylev [52]

Formula is y = a(x-h)^2 + k

Where h is 1 and k is 1

f (x) = a(x-1)^2 + 1

-3 = a(0-1)^2 + 1

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-3 = a(1) + 1

-3 - 1 = a

-4 = a

a = -4

A must be equal to -4

y = -4(x-1)^2 + 1

0 = -4(x-1)^2 + 1

4(x^2 - 2x + 1) - 1 = 0

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Divide fpr 4 each term of the equation....x^2 - 2x = -3/4

We must factor the perfect square ax^2 + bx + c which we don't have. We must follow the rule (b/2)^2 where b is -2....(-2/2)^2 = (-1)^2 = 1 and we add up that to both sides

x^2 - 2x + 1 = -3/4 + 1

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x1 = +1/2 + 1 = 3/2

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x-intercepts are 1/2 and 3/2, in form (3/2,0); (1/2,0)

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3 years ago

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The midpoint of XY is (3,-5). Find the coordinates of point X. Y=(2.5,-6.5)

White raven [17]

Answer:

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Step-by-step explanation:

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3 years ago

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