Answer:
x = 145°
Step-by-step explanation:
We know that y = 98°, so we can find ∠DBC:
180°-y = ∠DBC
180°-98° = 82°
We also know that z = 63°, therefore we can apply <u>exterior angle of triangles</u> to find x.
∠DBC + z = x
82°+63° = x
x = 145°
Answer:
0.012t + 28 = 30
Step-by-step explanation:
The depth starts at 28 meters. The amount of increase in t minutes will be 0.012t, so the total depth after t minutes is ...
0.012t +28
We want to find when that is equal to 30, so the appropriate equation is ...
0.012t +28 = 30
In order to get the x-intercept you need to get the x term alone on one side of the equation and likewise with y.
Y=mx+b, where m=(y2-y1)/(x2-x1) and b is equal to the value of y when x=0
We are given the point (0,0) so we know b=0, now just find the slope...
m=(-3-0)/(4-0)=-3/4 so the line is:
y=-3x/4
