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cestrela7 [59]
3 years ago
12

If y varies directly with x and y=30 when x=-10, find the value of x when y=4

Mathematics
1 answer:
mel-nik [20]3 years ago
4 0
If y∞x  then y=kx where k is constant to find k 
 k=y/x then   substitute the values
k=30/-10=-3 to find x when y is 4
x=y/k=4/-3=-4/3   option A
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4 0
3 years ago
Read 2 more answers
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professor190 [17]

Answer:

The bottle will last for 20 days.

Step-by-step explanation:

Given that:

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One milliliter = 20 drops

12 mL = 20*12 = 240 drops

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Number of days bottle will last = \frac{240}{12}=20

Hence,

The bottle will last for 20 days.

3 0
3 years ago
Find |−5|.<br> A. −5<br> B. 5<br> C. one-fifth<br> D. –one-fifth<br><br> HELP!!!
Volgvan

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To check:
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2 years ago
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