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Temka [501]
3 years ago
14

If x^2+y^2=49,xy=7 find x^3-y^3

Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer: 0

Step-by-step explanation: First substitute 7 for x and y

                                             7^3-7^3 = 0

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Help me please, i really don't understand!!
Nat2105 [25]

Answer:

x plus 4 divided by 5 minus 9

x + 4 / 5 - 9

4 0
2 years ago
Read 2 more answers
A survey shows that 10% of the population is victimized by property crime each year. A random sample of 527 older citizens (65 y
jekas [21]

Answer:

The data provide sufficient evidence that older people are more likely to be victimized.

Step-by-step explanation:

H 0 : P = 0.10

H 1 : P > 0.10 (Right tailed test)

n = 527, P = 0.1235

The test statistics

x = P - p / \sqrt{p*(1-p) / n}

x = 0.1235 - 0.10 / \sqrt{0.10 * 0.90 / 527}

x = 0.0235 / \sqrt{0.09 / 527}

x = 0.0235 / \sqrt{0.00017077798}

x = 0.0235 / 0.0130682049264618

x = 1.798257689731729

x = 1.798

P value = [1 - p(Z > 1.7980] (Right tailed test)

P value = 0.036089

The P - Value is very small, so <u>reject H0</u>

Conclusion: The data provide sufficient evidence that older people are more likely to be victimized.

7 0
3 years ago
Givers the linear sequence,<br> -2,7,X,Y, 2... Find the value of<br> Z.
Harrizon [31]

Answer:

Z = 34

Step-by-step explanation:

From the series, we have that:

a = -2

a + d = 7

Hence, -2 + d = 7

∴ d = 7 + 2 = 9

a + 2d = X; a + 3d = Y and a + 4d = Z

-2 + 4(9) = Z

∴ Z = 36 - 2 = 34

7 0
3 years ago
If you invest $4,500 in an account paying 2% compounded continuously, how much money will be in the account at the end of 4 year
saveliy_v [14]
Total = Principal * e^(rate*years)
Total = 4,500 * 2.718281828459^(.02*4)
Total = 4,500 * 2.718281828459^(.08)
Total = 4,500 * <span> <span> </span></span> <span> <span> <span> 1.0832870677 </span> </span> </span>
Total = <span> <span> <span> 4,874.79 </span> </span> </span>
calculator for checking the answer:
http://www.1728.org/compint.htm



7 0
3 years ago
What is 56% written as a ratio A)56 to 1
stellarik [79]
It c) because it 56 out of 100
5 0
3 years ago
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