Answer:
Her usual driving speed is 38 miles per hour.
Step-by-step explanation:
We know that:
In which s is the speed, in miles per hour, d is the distance, in miles, and t is the time, in hours.
We have that:
At speed s, she takes two hours to drive. So
However, on one particular trip, after 40% of the drive, she had to reduce her speed by 30 miles per hour, driving at this slower speed for the rest of the trip. This particular trip took her 228 minutes.
228 minutes is 3.8 hours. So
So
Her usual driving speed is 38 miles per hour.
The domain of the graph is 
while the range of the graph is 
.
- The domain of the graph is input values of "x" for which the function exists while the range is the output values "y" for which the function exists.
For the graph, the domain will be the values of the graph along the x-axis.
- Domain = (Note that -8 is not included)
- For the range, the interval is given as: . Note that the value of 4 is not included since it is opened.
Learn more on domain and range here: brainly.com/question/1942755
Answer:
X= -11/4 + -1/4 √145 or X= -11/4 + 1/4 √145
Step-by-step explanation:
Hope this helped<3
Answer:
pretty sure its B and C
Step-by-step explanation:
because they have a common multiplier of 2.5 and are similar triangles
18 x 2.5 = 45
20 x 2.5 = 50
Step-by-step explanation:
given,
the complete angle is complementry angle which is 90°
let the first angle be x and second angle be 7x ( as second angle is 7 times more than first angle )
now,
→ x + 7x = 90
→ 8x = 90
→ x = 90/8 = 11.25
therefore
1st angle = x = 11.25°
2nd angle = 7x = 7 × 11.25 = 78.75°
hope this answer helps you dear take care and may u have a great day ahead!
