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dsp73
2 years ago
6

HELP! USE EITHER LAW OF SINE OR LAW OF COSINE! HELP PLEASE! FIND THE MISSING SIDE AND MISSING ANGLES!​

Mathematics
2 answers:
Lelu [443]2 years ago
8 0

I hope this help with your math problem and more especially that you understand.

Eva8 [605]2 years ago
5 0

Answer:

∠Q ≈ 42.969, ∠P ≈ 52.03, QR ≈ 15.036

Step-by-step explanation:

Law of sines:

13/sin Q = 19/sin 85°

=> sin Q = 13 × sin 85°/19

=> Q = sin^-1 (13 × sin 85°/19)

=> Q ≈ 42.969

∠P=> 180 - 85 - 42.969 ≈ 52.03

QR/sin 52.03° = 19/sin 85°

=> QR = sin 52.03° × 19/sin 85°

=> QR ≈ 15.036

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2x − 3y + 4z = 23 x + 2y − 4z = −10 3x − y + 2z = 19 2 -3 4 1 2 -4 3 -1 2 Correct: Your answer is correct. x y z = 23 −10 19 Fin
Annette [7]

Answer:

(x, y, z) = (4, -1, 3)

Step-by-step explanation:

To solve the system of equations:

2x − 3y + 4z = 23 .........................(1)

x + 2y − 4z = −10 ..........................(2)

3x − y + 2z = 19..............................(3)

Simultaneously, we do that by first eliminating one variable from any two equations to have an equation in two variables. The process is repeated with one of the used equations and the third unused equation to have a second equation in two variables. The two equations in two variables obtained can then be easily solved simultaneously.

Let us eliminate z from (1) and (2)

Add (1) and (2)

(1) + (2):

3x - y = 13 ........................................(4)

Multiply (3) by 2

(3) × 2

6x - 2y + 4z = 38 ............................(5)

Add (5) and (2)

(5) + (2):

7x + 0 + 0 = 28

x = 28/7 = 4

Putting this in (4)

3(4) - y = 13

y = 12 - 13 = -1

Putting this in (3)

3(4) - 4(-1) + z = 19

z = 19 - 16 = 3

Therefore,

(x, y, z) = (4. -1, 3)

7 0
3 years ago
What is the correct answer?
Wittaler [7]
(b) (angle-side-angle) is correct.
6 0
2 years ago
Is this the correct ?<br> i’ll mark brainliest
bogdanovich [222]

Answer:

No, because you forgot to switch the sign when dividing by a negative number. Its the 2nd one

Step-by-step explanation:

7 0
3 years ago
Olivia paid $28 for a pair of boots that sold regularly for $80. What
marissa [1.9K]

35% because 35% of 80 is 28

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3 years ago
Three times a number, subtracted from 20, is equal to -7
tia_tia [17]
The answer is 20-3x=-7 explanation
4 0
2 years ago
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