Answer:
B, D, E
Step-by-step explanation:
The parenthesis can be removed and this is the same answer as D.
Moving the parenthesis to the first two terms gives B.
Lastly using multiplication sign rules that say -(-) = +, E is the same expression.
<em>( 5 - 2i ) ( 4 - i ) </em><em>18 - 13i</em>
<em>( 2 - 5i ) ( 1 - 4i ) </em><em>-18 - 13i</em>
<em>( 1 - 4i ) ( 5 - 2i ) </em><em>-3 - 22i</em>
<em>( 4 + i ) ( 2 - 5i ) </em><em> 13 - 18i</em>
Answer:
5x + y = 26
Step-by-step explanation:
Step 1: Distribute
y - 1 = -5x + 25
Step 2: Add 1 to both sides
y = -5x + 26
Step 3: Move 5 to the other side
5x + y = 26
Answer:
30 degrees
Step-by-step explanation:
P+Q+R=180
80+70+Q=180
Q=30
PQR = angle Q
a)
Answer: 0.91 m
Explanation:
We know that,
P.E. = m g h
Where,
P.E = Potential energy
m = Mass of the object
g = acceleration due to gravity (9.8 m/s²)
It is given that, m = 1.5 kg
P.E. = 13.44 J
⇒ 13.44 = 1.5 kg × 9.8 m/s² × h
⇒ h = 0.91 m
Hence, apple sits om 0.91 m tall counter.
b)
Answer: 216 J
Explanation:
P.E. = m g h
Weight, mg = 120 N ( given)
height, h = 1.8 m ( given)
The energy possessed by the suitcase is due to virtue of its position (gravitational potential energy)
P.E. = 120 N × 1.8 m = 216 J
Hence, the energy possessed by the suitcase sitting on the counter is 216 J.
