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zhenek [66]
3 years ago
6

7. If the value of x varies directly with the value of y, and x = 3 when y = 21. What is the valu

Mathematics
2 answers:
gulaghasi [49]3 years ago
6 0
So basically

When x = 3 , y= 21

3/21 = x/105

What number times 21 is equal to 105?
21* 5 = 105

So 3* 5 = 15

When x= 15, y= 105

Hope this helps!
konstantin123 [22]3 years ago
3 0

Answer:

15

Step-by-step explanation:

Because x=y÷7

i.e,105÷7=15

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the capacity of water tank is 250 liter and 3/4 of the tank is empty how much water is there in the tank​
Dmitry_Shevchenko [17]

Answer:

total capacity of tank = 250L

Portion of tank emptied = 3/4*250= 187.5L

water in tank = 250 - 187.5 =62.5L

5 0
4 years ago
Suppose a marketing company computed a 94% confidence interval for the true proportion of customers who click on ads on their sm
Ksivusya [100]

Answer:

d. There is a 98% chance that the true proportion of customers who click on ads on their smartphones is between 0.56 and 0.62.

Step-by-step explanation:

Confidence interval:

x% confidence

Of a sample

Between a and b.

Interpretation: We are x% sure(or there is a x% probability/chance) that the population mean is between a and b.

In this question:

I suppose(due to the options) there was a small typing mistake, and we have a 98% confidence interval between 0.56 and 0.62.

Interpreation: We are 98% sure, or there is a 98% chance, that the true population proportion of customers who click on ads on their smartphones is between 0.56 and 0.62. Option d.

3 0
4 years ago
Evaluate √ 9.6230 * 2.340 / 5.3 10 * 3.721​
adoni [48]

Answer:

\sqrt{15.76}

Step-by-step explanation:

\sqrt{9.6230 \frac{2.340}{5.310}3.721 }

Lets solve the fraction first

\frac{2.340}{5.310} =0.44

9.6230 x 0.44 = 4.23

4.23 x 3.721 = 15.76

\sqrt{15.76}

7 0
3 years ago
A construction worker worked 36 hours and earned $504, which included
torisob [31]

Answer:

A

Step-by-step explanation:

A

4 0
3 years ago
Read 2 more answers
What is the slope for (-1,3) and (-1,-3)?
Alex777 [14]

Answer:

(2,0)

Step-by-step explanation:

-1-1 = 2

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Taking x2 and x1 and y2 and y1 we have found our slope

6 0
3 years ago
Read 2 more answers
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