2 years ago

Find c and round to the nearest tenth. thank you in advance

Mathematics

1 answer:

PSYCHO15rus [73]2 years ago

4 0

Answer and Step-by-step explanation:

90ft = a

55ft = b

50ft = c

Plug into equation.

$50^{2} = 90^{2} + 55^{2} - 2(90)(55)cosC\\\\2500 = 11125 - 9900(cosC)\\\\-8625 = -9900(cosC)\\\\0.8712 = cosC\\\\cos^{-1} (0.8712) = C\\\\29.4$

29.4° is the answer.

You might be interested in

Classify the triangle if two angles in the triangle measure 40 and 50°.

vaieri [72.5K]

Answer:

Right Triangle

Step-by-step explanation:

Let's find the missing angle:

180 - (40 + 50)

180 - 90 = 90°

So we have a right triangle!

6 0

2 years ago

Read 2 more answers

Rectangular flower bed needs a thin metal border all the way around. The sides are 4' x 3' long how many feet of border should b

Phoenix [80]

Good luck to you! Any questions, ask away.

5 0

2 years ago

(3x-4y)^2-(3x-4y)(3x+4y)

zheka24 [161]

Answer:

$-24xy + 32y^2$

Step-by-step explanation:

Hello!

We can use the special binomial product formulas:

$(a + b)^2 = a^2 + 2ab + b^2$
$(a + b)(a - b) = a^2 - b^2$

<h3>Simplify</h3>

$(3x - 4y)^2 - (3x - 4y)(3x + 4y)$
$(9x^2-24xy+16y^2) - (9x^2 - 16y^2)$
$9x^2 - 9x^2 - 24xy + 16y^2 + 16y^2$
$-24xy + 32y^2$

The simplified form is $-24xy + 32y^2$

6 0

1 year ago

Describe youre version of a best freind

Alecsey [184]

Answer:

To me is a best freind is someone who has my back no matter what.

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

write a multiplication problem using two decimals that has a product greater than 0.1 but less than 0.2

wariber [46]

So the question is asking to write a multiplication problem that uses two decimals that has a product greater than 0.1 but less than 0.2 and in my further computation, I would give an example of 0.5*1.5 equals 0.75. I hope you are satisfied with my answer and feel free to ask for more

6 0

3 years ago

Read 2 more answers