Answer:
D.
Step-by-step explanation:
2=-2，3=-3
2²=-2²，3²=3²
Answer:
trapezium
Step-by-step explanation:
You start by figuring out how fast a lap is so you do
4.5 (4 1/2 miles)/3
=1.5 minutes
Which means it takes her 1.5 minutes to do 1/4 mile so you times that by four to get how long it takes her to run a mile
4x1.5
=6
This means it takes her 6 minutes to run a mile
To get this into miles per hour you divide 60 (because there’s 60 minutes in an hour) by 6 (her mile time)
60/6
=10
Therefore she is running 10 miles per hour
Answer:
55
Step-by-step explanation:
to get rs you simply add st and rt together,
Answer:
z - x.
Step-by-step explanation:
| 0 0 x-z |
| 0 1 y+z | = 0 |1 y+z| + 0 | 0 y+z| + x-z | 0 1 |
| 1 z z^2 | ||1 z^2| | 1 z^2 | | 1 z |
= 0 + 0 + (x - z)(0*z - 1*1)
= -(x - z)
= z - x
