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kumpel [21]
2 years ago
14

What is the sum of 10.8 + 42 4/5? A) 52 1/5 B) 52 3/5 C) 53 1/5 D) 53 3/5

Mathematics
1 answer:
ira [324]2 years ago
6 0
10.8 + 42 4/5 would be D) 53 3/5.
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The sum of two numbers is twenty-four. The difference of the two numbers is four.
RSB [31]

Answer:

x + y = 24

x - y = 4

Now, add these two equations.

You get,

2x = 28

x =  \frac{28}{2}

x = 14

Given,

x + y = 24

14 + y = 24

y = 24 - 14

y = 10

You can test this to the other equation as well.

x - y = 4

14 - 10 = 4

Hence, the two numbers are 14 and 10.

3 0
3 years ago
What is the rate of the boat in still water and what is the rate of the current?
Alekssandra [29.7K]

Answer: 2mp

Step-by-step explanation: Let "b" represent the speed of the boat in still water

Let "c" represent the speed of the current

Let "t" represent time

Downstream(same direction) =(b+c)*t

Upstream(against current)=(b-c)*t

(b+c)*3=24

(b-c)*4=16

3b+3c=24....all sides can be divided by 3 =b+c=8

4b-4c=16.....all sides can be divided by 4 =b-c=4

Use Elimination method

b+c=8

b-c= 4 Subtracting

=====

2c=4

find c by dividing both sides by 2. c=2

if c=2, substitute to get b

b+2=8

 -2=-2

======

b=6

Speed of boat in still water =6mph

rate of current=2mp

4 0
2 years ago
Can someone please help me with these problems i’d really appreciate it! :)
shepuryov [24]

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Blababa [14]
3 * 3 = 9 * 0.85 = 7.65 cubic feet of sand
6 0
3 years ago
Kevin will water his plants together on the 15 what other days will he water the plants together
melisa1 [442]
Have to explain the problem better

3 0
3 years ago
Read 2 more answers
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