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SashulF [63]
3 years ago
8

Why is -10+(-10)=0 wrong

Mathematics
2 answers:
Naya [18.7K]3 years ago
8 0

Answer:

-10+(-10)=-20

Step-by-step explanation:

This is incorrect because this is basically saying -10-10=? When is says to add outside of the parentheses and has a negative sign in it you always ignore the addition because it means that you have negative 10 and you are "adding" another negative 10 to it.

HOPE THIS HELPS XDDDDD

kenny6666 [7]3 years ago
5 0

Step-by-step explanation:

because because that would be subtracting positive 10 by -10. not adding -10 + -10 which would be 20

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Brian, Pip and Sara share some sweets in the ratio 4:5:1. Brian gets 42 more sweets than Sara.
Leno4ka [110]

Answer:

i got 70

Step-by-step explanation:

Brain   4           Brain gets 42 more sweets Sara

Pip      5           How many sweets does Pip get?

Sara    1

when   b = s + 42            find p        b = 4s    p = 5s

           4s = s + 42                           b/4 = s      p = 5b/4

           3s = 42

             s = 14           b = 56         p = 70      

     

I initially found the answer by trail and error, then I could figure out the equation.  

s     b      p

1     4      5

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8 0
3 years ago
The expression 100 + 20m100+20m100, plus, 20, m gives the volume of water in Eduardo's pool (in liters) after Eduardo spends mmm
hodyreva [135]

Answer:

205 litres

Step-by-step explanation:

Given:

Volume of water is given as:

V=100+20m (in litres)

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To find:

Volume of water in the pool after the water is filled for 5\frac{1}{4} minutes.

Solution:

Here, volume of water in the Pool (in litres) is given by the equation:

V=100+20m ....... (1)

Where m is the time for which Eduardo fills the pool.

Here, we are also given that

m = 5\frac{1}{4} minutes = \frac{5\times4+1 }{4}=\frac{20+1}{4}=\frac{21}{4} minutes

And we have to find the value of V after \frac{21}{4} minutes.

Let us put the value of m as \frac{21}{4} minutes in the equation (1) to find the value of V.

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