Answer:
B
Step-by-step explanation:
Rotation 180° is accomplished by negating both the x- and y-coordinates. That is, you multiply each of them by -1. You want the opposite of the identity matrix, so matrix B.
9514 1404 393
Answer:
7.83 km/h
Step-by-step explanation:
At her constant pace, Nina's time for 6 km will be found by the proportion ...
(time for 6 km)/(6 km) = (time for 9 km)/(9 km)
time for 6 km = (6 km)/(9 km) × (75 min) = 50 min
Jo's time for the same distance will be 4 minutes less: 50 -4 = 46 min. Jo's speed is ...
speed = distance/time
= (6 km)/(46/60 h) = 360/46 h ≈ 7.83 km/h . . . . Jo's speed
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<em>Additional comment</em>
From the 6 km point, the remaining race is half the distance already run, so will take half the time already taken. As we know, Nina will finish in 25 more minutes; Jo will finish in 46/2 = 23 more minutes, 2 minutes ahead of Nina.
Answer:
A) 3, B) 8 and 4, C) 12
Step-by-step explanation:
There are 3 terms: 8x^2, 4x, and 12.
The coefficiemts are numbers that come before a variable. That's why the coefficients are 8 and 4.
The constant is the number that doesn't come with a variable, thus 12.
Step-by-step explanation:
9m out of 9m³h−27m
9m(m²h−3)