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Sonja [21]
3 years ago
12

Copper has a density of 8.9 g/cm A copper necklace has a volume of 396 cm”.

Mathematics
1 answer:
Leviafan [203]3 years ago
7 0

Answer:

3524.4 g

Step-by-step explanation:

  • Use formula: Density = Mass/Volume
  • Mass= Density * Volume

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M<1=146° Find m<3 and explain how you know.
nalin [4]
<h3>Answer:  146 degrees</h3>

==========================================================

Explanation:

Angles 1 and 3 are vertical angles, which are always congruent.

Vertical angles form when we have an X shape like this. They are opposite one another. Angles 2 and 4 form the other pair of congruent vertical angles.

6 0
3 years ago
A boat travels 105 km downstream in 5 hours. The return trip upstream takes 7 hours. Find the speed of the boat in still water a
notsponge [240]
Speed of the boat = u
speed of the current = v

in downstream,
u - v = 105/5
u - v = 21

in upstream
u + v = 105/7
u + v = 15

add both equations
2u = 36
u = 18

v = -3

so
speed of the boat = 18 km/h
speed of the current = 3 km/h
4 0
3 years ago
A 23% increase followed by a 17% decrease is what percent change?
AVprozaik [17]
A 2.09% increase.

This is just some simple multiplication. A 23% increase is the same as multiplying by 1.23, and a 17% decrease is like multiplying by 0.83, since 100-17=83. Just multiply 1.23*0.83, which equals 1.0209, or a 2.09% increase.
7 0
3 years ago
Read 2 more answers
Two more than four times a number is the same as 6 more than twice the number find the number ​
Yuki888 [10]

Answer:

The number is 2. :)

Step-by-step explanation:

4x + 2 = 2x + 6

    -2            -2

4x = 2x + 4

-2x   -2x

2x = 4

/2    /2

x = 2  

7 0
3 years ago
Which of the following is carried by the blood and then is eliminated from the body? A. Carbon dioxide B. Ammonia C. Heat D.All
forsale [732]

Answer:

its A i believe so

Step-by-step explanation:

7 0
3 years ago
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