Answer:
Option B
Step-by-step explanation:
We are given the following system of equations -

Now by Cramer's Rule, we would first write down the matrix of the coefficients , replacing each column with the answer column -
,

Replace each column of the coefficients shown at the top, with the answer column at the bottom respectively -

Now solve through Cramer's Rule -
x = Dx / D = - 6,
y = Dy / D = - 1,
z = Dz / D = 1
<u><em>Solution = ( - 6, - 1, 1 ) = Option B</em></u>
Neck: In 2/3 of an hour Naomi will stretch her neck one (there's not enough time for two neck stretches, that would require an hour).
Legs: In 2/3 of an hour, she will stretch her legs twice (1 stretch every 1/3 of an hour for 2/3 of an hour equals 2).
Arms: In 2/3 of an hour she will stretch her arm four times (2/3 divided by 1/6 equals 4).
Total stretches: 1 neck stretch, 2 legs stretches, and 4 arms stretches.
Answer:
Sin A = 0.38462
Step-by-step explanation:
From the trigonometric function,
Sin A =
................... 1
So that, applying the Pythagoras theorem to determine the value of hypotenuse,
=
+ 
=
+ 
= 576 + 100
= 676
Hyp = 
= 26
The hypotenuse of the triangle is 26.
Thus, from equation 1;
Sin A = 
Sin A = 0.38462
Hi! i believe that the correct answer would be d, a=2, b=5, c=-1
hope this helped!:)