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4 years ago

I NEED HELP PLEASEE ASAP

Mathematics

1 answer:

11111nata11111 [884]4 years ago

4 0

Answer:

4) x = 168°

5) x = 4 ,,, ∠E = 99°

6) x = 200/3° ,,, 2x = 400/3°

Step-by-step explanation:

the sum of the interior angles of a figure = (number of sides - 2) * 180

the sum of the interior angles = (6 - 2) * 180 = 720°

the sixth angle = the sum of the interior angles - the sum of the five angles

x = 720 - (84 + 87 + 103 + 150 + 128) = 168

the sum of the interior angles = (4 - 2) * 180 = 360°

equation for x:

75 + 100 + 86 + 24x + 3 = 360

24x = 360 - 3 - 86 - 100 - 75

24x = 96

x = 96/24

x = 4

∠E = 24*4 + 3 = 99°

the sum of the interior angles = (5 - 2) * 180 = 540°

equation for x:

100 + 140 + 100 + x + 2x = 540

x + 2x = 540 - 100 - 140 - 100

3x = 200

x = 200/3

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2x = 2*200/3 = 400/3

100 + 100 + 140 + 200/3 + 400/3 =

300/3 + 300/3 + 420/3 + 200/3 + 400/3 =

1620/3 = 540

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6 0

4 years ago

Please help.........

Alex

Answer:

- $\frac{61}{11}$

Step-by-step explanation:

$\frac{x}{y}$ = $\frac{5}{6}$ ( cross- multiply )

6x = 5y ( divide both sides by 6 )

x = $\frac{5}{6}$ y

Then

$\frac{5x+6y}{5x-6y}$ ← substitute x = $\frac{5}{6}$ y into the expression

= $\frac{\frac{25}{6}y+6y }{\frac{25}{6}y-6y }$

= $\frac{\frac{61}{6}y }{-\frac{11}{6}y }$

= $\frac{\frac{61}{6} }{-\frac{11}{6} }$

= $\frac{61}{6}$ × - $\frac{6}{11}$

= - $\frac{61}{11}$

3 0

3 years ago

PLZ HELP ASAP RIGHT TRIANGLES

borishaifa [10]

The correct answer is: AB = 3.11

Explanation:
Since

$cos(\theta) = \frac{base}{hypotenuse}$ --- (1)
$\theta$ = 50°
base = 2

And hypotenuse = AB

Plug in the values in (1):
(1) => cos(50°) = 2/AB

=> AB = 2/0.643
=> AB = 3.11

6 0

4 years ago

PLEASE PLEASE HELP

noname [10]

Answer:

$8.51x10^{-3}cm$

Step-by-step explanation:

In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent. In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3. In order to add them, we can move the decimal over for the body cell diameter:

$5.1x10^{-4}=0.51x10^{-3}$

Add the two values: $0.51x10^{-3}+8x10^{-3}=8.51x10^{-3}cm$

7 0

3 years ago

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5 0

4 years ago