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3 years ago

can someone help me

Mathematics

1 answer:

Natalka [10]3 years ago

3 0

Answer:

it's c

Step-by-step explanation:

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How to solve these two problems ？

puteri [66]

8) $\theta$ is -0.896 radians

9) length of arc is 41.91 cm

Solution:

Given that,

$tan\ \theta = \frac{-5}{4}$

$\theta$ is in quadrant 4

To find: $\theta$

From given,

$tan\ \theta = \frac{-5}{4}\\\\\theta = tan^{-1} \frac{-5}{4}\\\\\theta = tan^{-1} (-1.25)\\\\\theta = -51.34$

Thus value of $\theta$ is -51.34 degrees

Convert degrees to radians

$-51.34\ degree = -51.34 \times \frac{ \pi }{180}\ radian\\\\-51.34\ degree = -0.896\ radian$

Thus $\theta$ is -0.896 radians

From given,

radius = 15.4 cm

$\theta = \frac{13 \pi }{15}$

<em><u>The length of arc when angle in radians is:</u></em>

$arc\ length = r \times \theta\\\\arc\ length = 15.4 \times \frac{ 13 \pi }{15}\\\\arc\ length = 15.4 \times 2.721\\\\arc\ length = 41.91$

Thus length of arc is 41.91 cm

4 0

3 years ago

The coordinates R(1, -3), S(3, -1) T(5,-7) form what type of polygon?

Reika [66]

- It's an obtuse triangle.

5 0

3 years ago

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8. The expression below is evaluated when x = 9, y = 3,

Reptile [31]

Answer:

Step-by-step explanation:

First of all substitute the values to where ever you see their corresponding variables to make them multiply.

x = 9

y = 3

z = 2

so we get

8x as 8(9),

7z as 7(2)

2y as 2(3)

then the it's will be

8(9) - 7(2) + 2(3)

which is

72 - 14 + 6

finally we get

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2 years ago

56 is 10 more than what?

olga2289 [7]

That's not true. 56 is 10 more than 46. 46 +10 is 56.

3 0

3 years ago

Soren has 2 jobs. During the day, he works as an office clerk. In the evening, he works as a cashier. His office job pays him $1

goldenfox [79]

I'm pretty sure the answer is B) 11c+8.5(c-46)=470
hope i help :)

7 0

3 years ago

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can someone help me