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3 years ago

Does anyone know this ? kinda confused because I have learned this yet I think

Mathematics

1 answer:

andrew11 [14]3 years ago

8 0

Answer:

a. 0

b. 0 (undefined)

c. 14

d. 0 (undefined)

Step-by-step explanation:

a. Make x on its own

x = 5 - 5

x = 0

b. Collect like terms (terms that have same variable)

2x - 6 = 2x - 6

Rearrange equation

2x - 2x = -6 + 6

0x = 0

x = 0 (undefined) -- This is because when you divide something by 0 (when 0 is the denominator), it is undefined

c. Rearrange to make whole numbers on one side

3x = 43 - 1

3x = 42

Divide both sides by 3 to make x on its own

x = 14

d. 4x - 4x = 7 + 1

0x = 8

x = 0 (undefined)

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Use △XYZ, in which ∠X is a right angle and tanY=815.

Neporo4naja [7]

Answer:

8/17

Step-by-step explanation:

The correct and complete question is:

<em>Use △XYZ, in which ∠X is a right angle and tanY=8/15. What is the ratio for sinY?</em>

From definition:

tan(Y) = opposite/adjacent

From the graph and the question:

tan(Y) = XZ/XY = 8/15

Then:

XZ = 8 and XY = 15. Using pytaghorean theorem:

XZ² + XY² = YZ²

8² + 15² = YZ²

√289 = YZ

17 = YZ

From definition:

sin(Y) = opposite/hypotenuse

From the graph:

sin(Y) = XZ/YZ

sin(Y)= 8/17

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3 years ago

A rectangular parking lot has a perimeter of 232 feet. the length of the parking lot is 36 feet less then the width. find the le

Troyanec [42]

Answer:

Length: 40 Width: 76

Step-by-step explanation:

W is width, and L is length.

We know that the length is 36 less than the width, so L = w - 36. Two times the width plus two times the length equals the perimeter, so set up the equation for the perimeter as:

232 = 2w + 2(w-36)

Now solve for w:

232 = 2w + 2w - 72

304 = 4w

w = 76

we now know that the width is 76, so solve for the length:

L= 76-36

L = 40

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3 years ago

Determine whether a quadratic model exists for the set of values below. If so, write the model. f(0) = -4, f(3) = -19, f(-1) =

Vikentia [17]

Answer:

A) The model exists: f(x) = -3x^2 +4x -4

Step-by-step explanation:

A quadratic model will always exist for 3 given points, provided they are not on a line. In that case, a linear model is appropriate.

Here, the slope between -1 and 0 is positive, and the slope between 0 and 3 is negative. Thus, we know these points are not collinear, and a model must exist.

The model is most easily found using a quadratic regression tool. Such is shown in the attachment. It tells us that ...

f(x) = -3x^2 +4x -4