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Levart [38]
2 years ago
5

ABCD is a rectangle. Find the measure of angle α to the nearest degree.

Mathematics
1 answer:
kodGreya [7K]2 years ago
5 0

Answer:

α ≈ 76°

Step-by-step explanation:

The vertices of a rectangle are right , that is 90°

Using the tangent ratio in right triangle ABC

tanα = \frac{opposite}{adjacent} = \frac{BC}{AB} = \frac{12}{3} = 4, then

α = tan^{-1} (4) ≈ 76° ( to the nearest degree )

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Write the equation in slope-intercept form for the line that passes through the given point
ASHA 777 [7]

Answer:

y=x+4

Step-by-step explanation:

2y=2x+4 simplifies down to y=x-2. Since the two lines are parallel, they have to have the same slope, but different y-intercepts. This means that we just have to find the y-intercept that will allow our line to pass through (-5, -1).

If we input the coordinates into what of our equation we have thus far (y=x+b), we just have to find what b needs to equal to make the equation true.

-1=-5+b                  -1=-5+4

b = 4                     -1=-1

8 0
3 years ago
PLEASE HELP? SERIOUSLY? :)
IRINA_888 [86]
2x + 5y = -8 . . . (1)
-133x - 4y = -8 . . . (2)

(1) * 4 => 8x + 20y = -32 . . . (3)
(2) * -5 => -665x + 20y = 32 . . . (4)

(3) - (4) => 673x = 0
x = 0
From (1), 2(0) + 5y = -8
5y = -8
y = -8/5
3 0
2 years ago
For the following problem, match the name of the number property that was used to get to each step from the previous step.
madam [21]

Answer:

1) Given, 2) Inverse property of addition, 3) Commutative property/Identity property of addition, 4) Inverse property of multiplication, 5) Identity property of multiplication/Result.

Step-by-step explanation:

In this exercise we present what real number properties are used in each step of the given procedure with its respective explanations:

1) 37\cdot 2\cdot \left[(-5)+5+\frac{1}{2} \right] <em>Given</em>

2) 37\cdot 2\cdot \left(0+\frac{1}{2} \right) <em>Inverse property of addition</em>

The inverse property of addition states that:

u + v = 0, \forall \,u, v \in \mathbb{R}

v = -u

3) 37\cdot 2 \cdot \left(\frac{1}{2} \right) <em>Commutative property/Identity property of addition</em>

The commutative property of real numbers states that:

u+v = v+u, \forall \,u,v\in\mathbb{R}

The identity property of addition of real numbers states that:

u+ 0 = u, \forall \,u\in\mathbb{R}

4) 37\cdot 1 <em>Inverse property of multiplication. </em>

The inverse property of real numbers states that:

u\cdot v = 1, \forall\,u,v \in \mathbb{R}

v = u^{-1} = \frac{1}{u}

5) 37 <em>Identity property of multiplication/Result.</em>

The identity property of multiplication of real numbers states that:

u\cdot 1 = u, \forall \,u\in \mathbb{R}

5 0
3 years ago
Write an equation in standard form of an ellipse that is 28 units high and 20 units wide
cestrela7 [59]
The standard form of ellipse with vertical major axis and center at the origin is:
x^2/b^2+y^2/a^2=1, a>b
2a=length of the major axis=28
a=14
a^2=196

2b=length of minor axis=20
b=10
b^2=100

x^2/196+y^2/100=1

making y the subject we get

y=5/7(196-x²)^0.5
8 0
3 years ago
What is the weight, in kg, shown by the arrow on the scale below?
Licemer1 [7]
0.8 kg
0.4 kg
1.2 kg
1.6 kg
6 0
2 years ago
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