Assuming the wire starts at x=0, the first point is (0,-4) since using y = 3x - 4 :
3(0) - 4 = -4

the two points are (0,4) and (-3,4)
since the y values are the same, the distance is the positive difference between the x values:
-3 - 0 = -3
then,
the distance is 3 meters

each meter costs $125, so multiply the cost by the amount of meters to find the total:
125 x 3 = 375

the total cost is $375

4 0

2 years ago

On which triangle can the law of cosines be used to find the length of an unknown side?

Archy [21]

The answer to the question is d

7 0

3 years ago

Find the length of YXZ.<br> A.s=3<br> B.s=60<br> C.s=75<br> D.s=236

Damm [24]

R = 15

The circumference of circle: $C=2\pi r$

subtitute: $C=2\pi\cdot15=30\pi$

$1\ rad=\dfrac{180^o}{\pi}\to5\ rad=5\cdot\dfrac{180^o}{\pi}=\dfrac{900^o}{\pi}$

$\dfrac{5\ rad}{360^o}=\dfrac{\frac{900^o}{\pi}}{360^o}=\dfrac{900^o}{\pi}\cdot\dfrac{1}{360^o}=\dfrac{5}{2\pi}$

$s=\dfrac{5}{2\pi}C\to s=\dfrac{5}{2\pi}\cdot30\pi=75$

Answer: C. s = 75

7 0

3 years ago