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Gnoma [55]
3 years ago
7

Help, I tried it, but I keep getting the wrong answers

Mathematics
1 answer:
Aneli [31]3 years ago
8 0

Answer:

my answer would be that

x = 17.91cm

(i'm not sure about it either but it's worth a try) !!

Step-by-step explanation:

so first off, using the equation given,

" c² = a² + b² — 2ab cos C "

we substitute the values in as,

a = 16

b = 30

then for C is the angle given, which is 30°

so the equation is now,

c² = (16)² + (30)² — 2(16)(30) cos 30°

now, you solve the two squared numbers and the back equation, also known as " 2ab cos C " with your scientific calculator.

so it now equals to,

c² = 256 + 900 — 960(0.87)

c² = 320.8

at last, when you have " c² = 320.8 " ,

remember to square root the answer so you have a smaller value.

so,

c equals to

\sqrt{320.8}

your final answer for the x value will be 17.91

(i hope this helps!)

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Answer:

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The perimeter of the given triangle:

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dmitriy555 [2]

one way is to factor the expressions

(a)

10^{5} (1.2 + (5.35 × 10^{1}))

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(b)

10^{-3}((6.91 × 10^{1}) + 2.4)

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(e)

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