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irina [24]
3 years ago
13

Opposite value of -(-25)

Mathematics
1 answer:
vazorg [7]3 years ago
5 0

Answer:

The answer would -25

Step-by-step explanation:

Negative times a Negative or when subtracting a negetive you wil always get a positive. Son in this case the 25 would become positive so the oposite is the negative.

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Two bowls and one cup weigh 800 grams. One bowl and two cups weigh 700 grams. Find the weight of the bowl and the cup
antoniya [11.8K]

Answer:

\large \boxed{\textbf{Bowl = 300 g; cup = 200 g}}  

Step-by-step explanation:

 Let b  = the mass of a bowl  

and c = the mass of a cup  

We have two conditions:  

\begin{array}{lrcl}(1) &2b + c  & = & 800\\(2) & b + 2c & = & 700\\\end{array}

Calculations:  

\begin{array}{lrcll}(3) & 4b + 2c &=  & 1600&\text{ Multiplied (1) by 2}\\& 3b & = & 900&\text{Subtracted (2) from (3)}\\(4) & b & = & \mathbf{300}&\text{Divided each side by 3}\\ & 600 + c & = & 800&\text{Substituted (4) into (2}\\ & c & = & \mathbf{200}\\\end{array}\\\text{The mass of a bowl  is $\large \boxed{\textbf{300 g}}$ and that of a cup is $\large \boxed{\textbf{200 g}}$}

Check:

\begin{array}{rlcrl}2(300) + 200& =800 & & 300 + 2(200) & = 700\\600 + 200 & = 800& & 300 + 400 & = 700\\800 & = 800& & 700 & = 700\\\end{array}

OK.

6 0
3 years ago
What is the slope of this line
kifflom [539]

Answer:

3/4

Step-by-step explanation:

We can find the slope from the two points given

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    = (1+2)/(2+2)

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8 0
4 years ago
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Answer:

0.000000073

Step-by-step explanation:

Given number is,

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

74 + 90 = 164

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7 0
4 years ago
Read 2 more answers
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