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masha68 [24]
3 years ago
6

Can someone please help me with math.

Mathematics
1 answer:
olasank [31]3 years ago
3 0

Answer:

Its C

Step-by-step explanation:

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In A certain chemical, the ratio of zinc to copper is 3 to 19. A jar of the chemical contains 836 grams of copper. How many gram
Elis [28]

Answer:

The jar contains 132 grams of zinc

Step-by-step explanation:

zinc to copper = 3 : 19

New equivalent weights

zinc to copper = x : 836

Now, let us solve for x as follows

\frac{zinc}{copper}  = \frac{3}{19} = \frac{x}{836} \\\\cross-multiplying\\3 \times\ 836 = 19 \times\ x\\2508 = 19x\\x = \frac{2508}{19}\\x =  132

the jar contains 132 grams of zinc

To check if the answer is accurate, the answer gotten when the weight of zinc is divided by copper will be the same for both the old and new ratios:

old ratio: 3 ÷ 19 =  0.158

new ratio: 132 ÷ 836 = 0.158

3 0
3 years ago
PLEASE HELP ME RN I WILL MARK THE BEST ANSWERS BRAINLEAST AND MARK 5 ANSWER THE ONES U KNOW NOOOO EXPLAINTION NEEDED
Novosadov [1.4K]

For the first question, the answer is 25/14.

Because 14x = 25y    Which means x must equal more than y. And 25/14 is the only answer like this.

For the second question, the answer is 30 x 18.

30/5 = 6     18/3 = 6      18 + 18 + 30 + 30 = 96

So, both the perimeter and the ratio is correct with this answer.

For the third question, the first answer is correct.

x < -4    and only a negative number can be less than another negative. Also, the negative must have a higher value to be less than another negative.

For the last question, the last answer is correct. no explanation for this one, it would take too long ;)

4 0
3 years ago
What is the dependent and independent variable?and <br> What is the (x) and (y) axis?
Nata [24]

Answer:

and independent variable It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable. and a Just like an independent variable, a dependent variable is exactly what it sounds like. It is something that depends on other factors. For example, a test score could be a dependent variable because it could change depending on several factors such as how much you studied, how much sleep you got the night before you took the test, or even how hungry you were when you took it.

8 0
3 years ago
Alexandra spends 1/3 of her daysleeping and 3/8 of her day at work. What fraction of Alexandra’s day is occupied by sleep or wor
Alex777 [14]

Answer:

17/24

Step-by-step explanation:

Change the denominators to match

8/24 + 9/24 = 17/24

4 0
3 years ago
If 2/5 kilograms of soil fit into 1/3 of a container, can 1 kilogram fit in the container??
Elodia [21]
In this problem the amount of kilograms you want to fit ( lets call it x ) has a direct variation with the amount of kg of soil it can fit in ( lets cal it y )

If 2/5x = 1/3y
Now we just need to isolate x or y to discover the proportion that relates them :

You can isolate x by multiplying both sides of the equation by 5/2
2/5x(5/2) = 1/3y(5/2)
x = 5/6 y
So what that means is that 1 kg of soil takes 5/6 of the container!
Awnser : Yes it can !

I hope you understood my brief explanation. And please consider marking this awnser as Branliest. Thank you ! :)
8 0
4 years ago
Read 2 more answers
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