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3 years ago

If you're good at trigonometry please help meeee

Mathematics

2 answers:

Maurinko [17]3 years ago

6 0

Answer:

$\boxed{92 \: \mathrm{mm}}$

Step-by-step explanation:

sin θ = $\frac{opposite}{hypotenuse}$

sin (60) = $\frac{80}{x}$

x = $\frac{80}{\mathrm{sin} (60)}$

x = 92.37604307...

x ≈ 92

Zielflug [23.3K]3 years ago

4 0

Using the base dimension and either given angle you can solve for x

Sin(angle) = opposite leg/ hypotenuse

Sin(60) = 80/x

X = 80/sin(60)

X = 80/ sqrt(3)/2

X = 160/3 x sqrt(3). (This is exact answer)

For a decimal answer: 160/3 = 53 1/3

Multiplied by sqrt(3) = 92.376 mm

Rounded to nearest mm = 92

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Which description does NOT guarantee that a quadrilateral is a rectangle?

Kisachek [45]

Answer: A

a quadrilateral with all four angles right

Step-by-step explanation:

A quadrilateral is a rectangle if a quadrilateral has all four angles right,

a parallelogram with congruent sides

a quadrilateral with diagonals that are congruent and bisect each other

a quadrilateral with all congruent angles. Because a rectangle possesses 2 pairs of parallel sides, 4 right angles at 90°. It has opposite sides which

are parallel and congruent. And all its angles are congruent.

But a quadrilateral with all four angles right is a description that does NOT guarantee that a quadrilateral is a rectangle. Because this description is also applicable to a square.

8 0

3 years ago

What two numbers multiply to -112 and add up to -54

SVETLANKA909090 [29]

Xy = -112
x + y = -54

$xy = -112$
$\frac{xy}{x} = \frac{-112}{x}$
$y = \frac{-112}{x}$

$x + y = -54$
$x + \frac{-112}{x} = -54$
$\frac{x^{2}}{x} + \frac{-112}{x} = -54$
$\frac{x^{2} - 112}{x} = -54$
$x^{2} - 112 = -54x$
$x^{2} + 54x - 112 = 0$
$x^{2} + 56x - 2x - 112 = 0$
$x(x) + x(56) - 2(x) - 2(56) = 0$
$x(x + 56) - 2(x + 56) = 0$
$(x - 2)(x + 56) = 0$
$x - 2 = 0$ $or$ $x + 56 = 0$
$x = 2$ $or$ $x = -56$

  x + y = -54
  2 + y = -54
- 2   - 2
y = -56
  (x, y) = (2, -56)

  or

x + y = -54
  -56 + y = -54
+ 56 + 56
y = 2
  (x, y) = (-56, 2)

The two numbers that multiply to -12 and add up to -54 are -56 and 2.

6 0

4 years ago

Read 2 more answers

Solve for x: x - 5y = -1

Fantom [35]

Answer:

x = -1 + 5y

Step-by-step explanation:

If you writing this equation in terms of x then the answer is correct, however, if there is a value for y, then you just need to sub it into y.

For example,

Find x when y = 3

x = -1 + 5(3)

= -1 + 15

= 14

6 0

3 years ago

Wait

taurus [48]

A. 66 square units since you do 11x6

7 0

3 years ago

What are 5 numbers that have 5, 11, and 2 as prime factors

Firdavs [7]

110, 220, 330, 440, 550

hope this helps

5 0

3 years ago