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BaLLatris [955]
3 years ago
10

If 2x-3y=10. and xy=16 find the value of8x³-27y³

Mathematics
1 answer:
andrew11 [14]3 years ago
7 0

Answer:

8x³-27y³=3880

Step-by-step explanation:

2x-3y=10

xy=16

8x³-27y³=?

as we know that

(a-b)³=a³-b³-3ab(a-b)

now we substitue the formula according to our question

(2x-3y)³=(2x)³-(3y)³-3(2x)(3y)(2x-3y)

(10)³=8x³-27y³-18(16)(10)

1000=8x³-27y³-2880

1000+2880=8x³-27y³

3880=8x³-27y³

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Answer:

So 12 of 15 free throws is 80% so she would have to make at least 13 of 15 free throws to at least get over 85% cause 13 of 15 is 86.6% repeated

Step-by-step explanation:

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3 years ago
In which quadrant or on which axis do each of the points (-2,4) , (3,-1) ,(-1,0), (1,2) and
exis [7]

Answer:

Step-by-step explanation:

cartesian plane :

quadrant 1 : both x and y are positive

quadrant 2 : x is negative, y is positive

quadrant 3 : both x and y are negative

quadrant 4 : x is positive and y is negative

(-2,4)......we have x is negative and y is positive...so we are in quadrant 2

(3,-1)....we have x is positive and y is negative...in quadrant 4

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5 0
3 years ago
The population of bacteria doubles every 6 hours. By how much will it grow in three days. Write the equation
ch4aika [34]

Answer:

Step-by-step explanation:

let x be the population

so we have ,

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by cross multiplication we have

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3 years ago
What is the slope between (2,4) and(3,-6)
RSB [31]

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2/5

Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
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lbvjy [14]

Answer: 0.24 +/- 0.088 = (0.152, 0.328)

Step-by-step explanation:

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The solution for the given confidence interval is derived using the equation

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Where p = 0.24 q= 1-p = 0.76, n=100 z= 2.05

= 0.24 +/- 2.05√(0.24×0.76/100)

= 0.24 +/- 2.05(0.0427)

=0.24 +/- 0.088

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6 0
3 years ago
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