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EastWind [94]
2 years ago
10

Which expression is equal to 5x(m-n) 1. (m-5)x(n-5) 2. 5m-5n 3. m-5n

Mathematics
2 answers:
vitfil [10]2 years ago
5 0
#2. 5m-5n would be the equal expression
Flauer [41]2 years ago
4 0
5m-5n
Multiply each term in the parentheses by 5
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Phoenix [80]

Answer:

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Step-by-step explanation:

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2 years ago
Given z1 = 2 +StartRoot 3 EndRoot i and z2 = 1 – StartRoot 3 EndRoot i, what is the sum of z1 and z2?
Fofino [41]

Answer:

z1 + z2 = 3

Step-by-step explanation:

Since we are given z1 = 2 + √(3)i and z2 = 1 – √(3)i. The sum of z1 + z2 would be:

(2 + √(3)i) + (1 – √(3)i) = 2 + √(3)i + 1 – √(3)i = 2 + 1 + √(3)i – √(3)i = 3

Hence, z1 + z2 = 3.

8 0
3 years ago
Read 2 more answers
A train goes twice as fast downhill as it can go uphill, and 2/3 feet as fast uphill as it can go on level ground. If it goes 12
Yuri [45]

Answer:

0.5hrs

Step-by-step explanation:

Let the speed downhill be x,

Speed uphill is 0.5x. We are told than speed uphill is \frac{2}{3} the speed on flat ground. Therefore the speed on level ground will be \frac{0.5x}{2/3}=0.75x.

From this info, we can obtain the actual speed,v_g on level ground as:

x=120m/h\\0.75x=v_g\\\\\therefore v_g=\frac{0.75x \times 120m/h}{x}\\v_g=90m/h

speed, distance and time have the relation s=d/t so to obtain time to cover 45miles:

t=d/s\\=45/90\\=0.5h

Hence it takes 0.5hrs to cover 45miles on flat ground.

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3 years ago
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What the two or more numbers or amounts? Something needs to be compared
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Answer:

A. 1

Step-by-step explanation:

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3 years ago
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