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Schach [20]
3 years ago
13

Which of the following expressions is not equivalent to 12x + 18y?

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
8 0
A. 6(2x + 3y)

you divide 12 and 6 which will give you 2 then you divide 18 and 6 which will give you 3
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In a certain​ chemical, the ratio of zinc to copper is 3 to 16. A jar of the chemical contains 736 grams of copper. How many gra
evablogger [386]

The jar has 138 grams of zinc.

<u>Solution:</u>

Given that , In a certain chemical reaction, the ratio of zinc to copper is 3 to 16.  

A jar of the chemical contains 736 grams of copper.  

We have to find how many grams of zinc does it contain

Let "n" be the grams of zinc needed for 736 grams of copper  

Now, we know that,  

16 grams of copper ⇒ 3 grams of zinc

Then, 736 grams of copper ⇒ n grams of zinc

So, by criss cross multiplication,

n \times 16 = 3 \times 736

16n = 3 x 736

16n = 2208

n = 138

Hence, the jar has 138 grams of zinc.

5 0
3 years ago
Vanessa is training for the marathon.She runs 4 1/2 miles each
neonofarm [45]

Answer:

54 miles

Step-by-step explanation:

4.5 miles each day except Sunday is 6 days per week

In 2 weeks, she runs 12 days

4.5 miles × 12 = 54 miles

8 0
3 years ago
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For the inverse variation function y = k/x (where x, k &gt; 0), what happens to the value of y as the value of x increases?
Allisa [31]
As the value of x increases, y decreases.

7 0
3 years ago
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What is the value of the expression 30+(-6)?<br> A -180<br> B -5<br> C 5<br> D 24
Evgesh-ka [11]

Answer:

24

Step-by-step explanation:

from the question above,

30+(-6) =

when plus is multiplying minus it's minus

+ × - = -

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4 0
2 years ago
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Use elimination to solve each system.
stiks02 [169]
Box of Popcorn: $3.00 
Drink: $2.00 

I might be wrong, but hopefully that helped! :) 
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3 years ago
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