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Readme [11.4K]
4 years ago
10

Which Expression has a value of 39?

Mathematics
1 answer:
cluponka [151]4 years ago
4 0
I believe d is the answer
:)


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it's from Khan Academy and there are answer choices it's called interpet negative number addition and subtraction expression ​
kolbaska11 [484]

Answer: Hi!

Answers B and D are correct.

For B, since negative numbers are on the left side of the number line, a positive number would have to be to the right of a negative number. Since we are adding a negative and a positive number of the same absolute value (9), they would cancel out to 0, which makes D true.

Hope this helps!

4 0
4 years ago
Read 2 more answers
It takes about me 25 minutes to make out a test for a mathematics class how long will it take to make out test for all five of m
ira [324]

Answer:

125 minutes total.

Step-by-step explanation:

You do:

25 times 5

= 125 minutes.

6 0
3 years ago
Read 2 more answers
Sterling silver is an alloy of silver that is 92.5% pure silver. If x grams
nlexa [21]

Answer:

D. 0.925x + 0.88y = 0.91(x + y)  

Step-by-step explanation:

The important point to remember is that the total mass of pure silver is the same on each side of the equation.

0.925x = mass of pure silver in first alloy

0.88  y = mass of pure silver in second alloy

The final alloy has a mass of (x + y) g and is 91 % pure silver, so

0.925x + 0.88y = 0.91(x + y)

5 0
3 years ago
Read 2 more answers
Write the result of subtracting the second equation from the first?
aksik [14]

Answer:

Could you please put a link to the question???

Step-by-step explanation:

We can only solve the question if you give us more info about the question.

8 0
3 years ago
WARNING : NON SENSE ANSWER REPORT TO MODERATOR ​
Rzqust [24]

Answer:

\frac{180}{147}

Step-by-step explanation:

  • Simplify (\frac{3}{-7} - \frac{11}{21} )

=> \frac{(-3 \times 3) - 11}{21}

=> \frac{-9 - 11}{21}

=> \frac{-20}{21}

  • Find the additive inverse of  \frac{-20}{21} by using its property - <em>"Sum of a number & its additive inverse is always zero". </em>Assume that 'x' is an additive inverse of  \frac{-20}{21}.

=> x + \frac{-20}{21} = 0

=> x = 0 - (-\frac{20}{21}) = \frac{20}{21}

  • Simplify (\frac{9}{5} \div \frac{7}{5} )

=> \frac{9}{5} \times \frac{1}{\frac{7}{5} }

=> \frac{9}{5} \times \frac{5}{7}

=> \frac{9}{7}

  • Now, find the product of \frac{9}{7} & \frac{20}{21}

=> \frac{9}{7} \times \frac{20}{21}

=> \frac{180}{147}

3 0
3 years ago
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