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3 years ago

S f(-x)= x^2 -1 odd, even or neither

Mathematics

1 answer:

natka813 [3]3 years ago

5 0

Answer:

f(x) = f(-x) = x^2 -1 is an even function

Step-by-step explanation:

When f(x) = f(-x), the function is symmetrical about the y-axis. That is the definition of an even function.

___

An odd function is symmetrical about the origin: f(x) = -f(-x).

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How many complete rotations does the minute hand of a clock makes as its moves from 1200 pm to 4 pm

Katena32 [7]

12 pm to 4 pm = 4 hours, 1 hour is 60 rotations, thus: 4*60=240 Rotations.

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3 years ago

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5. x + y = 2(2k) + 1

NeX [460]

Step-by-step explanation:

i try my best to solve this qs plz check it and tell me?

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3 years ago

Select the correct choice that completes the sentence below.

vodomira [7]

$\sf \red⇛ \green {3a + 1 = 16}$

Move the constant to the right-hand side and change its sign to minus sign since it is in plus

$\sf \red⇛ \green{3a = 16 - 1}$

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On observing the above steps, Option B is correct!
First step is subtraction then division

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2 years ago

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Help with 8th-grade middle school math show work

ss7ja [257]

Answer:

So for the triangle, we have x = 25 and the angles 45-75-60.

So for the quadrilateral, we have x = 75 and the angles 70-110-75-105.

Step-by-step explanation:

For each of these problems, we can simply add the expressions of the angles given matched to the sum of the angles for the shape given below. Once we do this, we can solve for x, and then state the given measures of each angle of the shapes.

For the triangle:

60 + ( x + 20 ) + 3x = 180

60 + x + 20 + 3x = 180

60 + 20 + x + 3x = 180

80 + x ( 1 + 3 ) = 180

80 + x ( 4 ) = 180

80 + 4x = 180

4x = 100

x = 25

We have the given angles:

x + 20 ==> 25 + 20 ==> 45

3x ==> 3 (25) ==> 75

So for the triangle, we have the angles 45-75-60.

For the quadrilateral:

( x - 5 ) + ( x + 35 ) + x + 1.4x = 360

x - 5 + x + 35 + x + 1.4x = 360

35 - 5 + x + x + x + 1.4x = 360

30 + x ( 1 + 1 + 1 + 1.4 ) = 360

30 + x ( 4.4 ) = 360

30 + 4.4x = 360

4.4x = 330

x = 75

So, we have the given angles:

x - 5 ==> 75 - 5 ==> 70

x + 35 ==> 75 + 35 ==> 110

x ==> 75

1.4x ==> 1.4(75) ==> 105

So for the quadrilateral, we have the angles 70-110-75-105.

Cheers.

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3 years ago

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Ira purchased a new dishwasher for $361.35. The dishwasher was on sale for 17.5% off. What was the original price of the dishwas

Anika [276]

Answer: $438
To solve this equation, you cross multiply. I first subtracted 17.5 from 100 in order to get the percentage value that $361.35 was of its original price. Since 100 - 17.5 = 82.5, the washing machine is 82.5% of its original price.

I cross multiplied by writing $\frac{361.35}{1} * \frac{82.5}{100}$ , and multiplying $361.35 * 100$ and $82.5 * 1$ . The result was $\frac{36135}{82.5}$ . This becomes $438. There is no rounding needed to be done.

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4 years ago

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