Answer:10
Step-by-step explanation:
Answer:
Replace the variable x with −1
in the expression.
f(−1)=−(−1)²−1
Simplify −(−1)²−1.
Remove parentheses.
−(−1)²−1
Multiply −1 by (−1)²
by adding the exponents.
(−1)³−1
Raise −1 to the power of 3.
−1−1
Subtract 1 from −1.
−2
Step-by-step explanation:
Hope it's right
The speed of a yacht traveling a distance of 1.357 km in 165 minutes is 0.5 km/h
<h3>What is Speed?</h3>
The speed of an object is the distance covered by the object in respect to time.
Mathematically:
![\mathbf{Speed = \dfrac{distance}{time}}](https://tex.z-dn.net/?f=%5Cmathbf%7BSpeed%20%3D%20%5Cdfrac%7Bdistance%7D%7Btime%7D%7D)
![\mathbf{Speed = \dfrac{1.375 \ km}{165 minutes }}](https://tex.z-dn.net/?f=%5Cmathbf%7BSpeed%20%3D%20%5Cdfrac%7B1.375%20%5C%20km%7D%7B165%20minutes%20%7D%7D)
- We know that 60 minutes = 1 hour
- 165 minutes = 2.75 hours
![\mathbf{Speed = \dfrac{1.375 \ km}{2.75 \ hours}}](https://tex.z-dn.net/?f=%5Cmathbf%7BSpeed%20%3D%20%5Cdfrac%7B1.375%20%5C%20km%7D%7B2.75%20%5C%20hours%7D%7D)
Speed = 0.5 km/hour
Learn more about calculating speed here:
brainly.com/question/4931057
Answer:
10 times
Step-by-step explanation:
Multiply 40 by 28
1120
Multiply 16 by 7
112
Divide the two numbers
You get 10
Hope this helps!
Answer:
No solution, D
Step-by-step explanation:
If you rewrite the second one to be the y=mx+b form then you get
8x-14= -2y
Divide by -2 and get
-4x+7=y
Because the slopes are the same the lines will never intersect which means there is no solution