She drove 2 hours at 70 miles per hour, so she drove 70 * 2 = 140 miles total.
The jet traveled 400 miles per hour for 2 hours for a total of 400 * 2 = 800 miles.
Total miles = 140 + 800 = 940 miles.
The answer is C.
Answer:
66.66%
Step-by-step explanation:
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0.70833333333 is the answer
Answer:
the answer to that would be y=3x-9
If cos x= sin(20 + x)° and 0° < x < 90° then value of x is 35 degrees
<em><u>Solution:</u></em>
Given that:

We know that,



Taking cos x as common,


By trignometric functions,
sin 20 = 0.34202
cos 20 = 0.939692
So,

Therefore,
x = arc tan (0.7002)
x = 35 degrees
Therefore value of x is 35 degrees
<h3><u>Method 2:</u></h3>
cos x = sin (20 + x)
sin and cos are co - functions, which means that:
cos x = cos [90 - (20 + x)]
cos x = cos (90 - 20 - x)
cos x = cos (70 - x)
Therefore, x = 70 - x
x + x = 70
2x = 70
x = 35
Therefore value of x is 35 degrees