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Levart [38]
3 years ago
15

Figure ABCD is a parallelogram.

Mathematics
1 answer:
Mandarinka [93]3 years ago
4 0

Answer:

AB = 10 units, and BC = 28 units

Step-by-step explanation:

Segments AB and DC are equal to each other, so we can set both equations equivalent to each other on opposite sides of an equation.

3y - 2 = y + 6

3y = y + 8

2y = 8

y = 4

Now we can plug in our y variable (4) into one of the segments equations; either AB's or DC's.

3y - 2

3(4) - 2

12 - 2

10

Segments AB and DC = 10

We can do the same thing with segments AD and BC.

2x - 4 = x + 12

2x = x +16

x = 16

Now we can plug in out x variable (16) into one of the segments equations; either AD's or BC's.

2x - 4

2(16) - 4

32 - 4

28

Thus, both segments AD and BC are 28 units long.

Our answer would be AB = 10 units, and BC = 28 units.

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Answer:

  • domain: {x ∈ ℝ : x ≤ 5}
  • range: {y ∈ ℝ : y ≤ -1}

Step-by-step explanation:

<u>Domain</u>

The domain of a function is the set of x values for which the function is defined. Here, the domain is limited by the values of x that make the square root defined. That is, the expression under the radical cannot be negative:

  -3x +15 ≥ 0

  15 ≥ 3x . . . . . . add 3x

  5 ≥ x . . . . . . . . divide by 3

  x ≤ 5 . . . . . . . . put x on the left (swap sides)

The rest of the notation in the domain expression simply says x is a real number.

  domain: {x ∈ ℝ : x ≤ 5} . . . . . . matches the first choice

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<u>Range</u>

The range of a function is the set of values that f(x) can have. We know the square root can be zero or any positive number. When it is zero, f(x) = -1.

When it is a positive number, that value is multiplied by -4 and added to -1, so f(x) is a number more negative than -1. Then the range of the function is all numbers -1 and below:

  range: {y ∈ ℝ : y ≤ -1} . . . . . . matches the last choice

_____

<em>Comment on domain/range problems</em>

When working domain and range problems, it works well to have a good understanding of the domain and range limitations of the functions we usually work with: polynomials, square root, logarithm, trig functions, exponential functions. Domain and range problems generally involve combinations of these or ratios of combinations of these.

3 0
3 years ago
Sam bought a teddy bear for $3.75 and a stuffed unicorn for $7.50. He gave the cashier $20. How much change did he receive? *
kenny6666 [7]

Answer:

3.75+7.5 = 11.25

20 dollars in total how much change.

20 - 11.25 = 8.75

$8.75 change

7 0
2 years ago
Cual es el mínimo común pultiplo de3/7,1/4,2/5,6/10,4/6
MAXImum [283]
I am not understanding what you are asking


8 0
3 years ago
What is the value of x in the equation (x-2/3)+(1/60)=(5/6)
Roman55 [17]
<span>(x-2/3)+(1/60)=(5/6)
x-2/3= 5/6 - 1/60
x-2/3 = 49/60
x - 2 = 49/20
x = 49/20 + 2
x = 89/20

The answer is: x = 89/20 or x = 4.45.
</span>
4 0
3 years ago
Solve the inequality m + 2 &lt; -4
jeka57 [31]

Answer:

m < - 6

Step-by-step explanation:

Given

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m < - 6

7 0
3 years ago
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