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Serhud [2]
3 years ago
13

If xy=5 and x square +y square =25 ,then (x+y)square ​

Mathematics
2 answers:
nika2105 [10]3 years ago
8 0

Answer:

(x + y)² = 35

Step-by-step explanation:

The expansion of

(x + y)² = x² + 2xy + y²

           = x² + y² + 2xy ← substitute given values

          = 25 + 2(5)

           = 25 + 10

           = 35

Salsk061 [2.6K]3 years ago
4 0

Answer:

35

Step-by-step explanation:

xy = 5 \\  \\  {x}^{2}  +  {y}^{2}  = 25 \\  \\  \because  \:  {(x + y)}^{2}  =  {x}^{2}  +  {y}^{2}  + 2xy\\  \\    \therefore {(x + y)}^{2}  =  25 + 2 \times 5 \\  \\ \therefore {(x + y)}^{2}  =  25 + 10 \\  \\  \huge \red{ \boxed{\therefore {(x + y)}^{2}  =  35}}

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diamong [38]

D. 1/3

A cube root can be written as an exponent: 1/3

\sqrt[3]{x} = x^{\frac{1}{3} }

5 0
3 years ago
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Given the function f(x) = 5(x+4) − 6, solve for the inverse function when x = 19.
meriva

Answer:

5.74

Step-by-step explanation:

fx=5(x+4)-6

f(19)=5(19+4)-6

19f=5(23)-6

19f=115-6

19f=109

f=109÷19

f=5.74 or 19 14/19

7 0
3 years ago
OH NO!!! Madeleine’s data has been corrupted, again! Using the incomplete data file below, which she was able to recover from he
-Dominant- [34]

Answer:

a. N=25

b. X[bar]= 60.52

c. Y[bar]= 106.72

d. SSx= 115.24

e. ∑X*∑Y = 4036684

f. SSxy= 202020.3296

g. √(SSx*SSy)= 449.46

Step-by-step explanation:

Hello!

Using the attached data you need to calculate some statistics.

a) N

The sample size is listed under the first column "subject" You can see that 25 subjects qhere studied so N=25.

b.

The mean of set X is equal to X[bar]= ∑X/n= 1513/25= 60.52

∑X is listed in the second table.

c.

The mean of ser Y is Y[bar]= ∑Y/n= 2668/25= 106.72

∑Y is listed in the second table.

d.

Sum of Squares of set X SSx= ∑X²-[(∑X)²/n]= 91682-[(1513)²/25]= 115.24

e.

∑X*∑Y =1513*2668= 4036684

f.

SSxy= (∑X²-[(∑X)²/n]) * (∑Y²-[(∑Y)²/n])= (91682-[(1513)²/25]) * (286482*[(2668)²/25])= 202020.3296

g.

√(SSx*SSy)= √(115.24*1753)= 449.46

I hope you have a SUPER day!

3 0
3 years ago
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Zina [86]
So 5^2 -4^2 is 25-16 which is 9
6^2/9 is 36/9 which is 4 +9 is 13
13(13) is 169
7 0
3 years ago
Factor −3y−18 and choose the correct option.
balu736 [363]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
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