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mars1129 [50]
3 years ago
5

Step by step Please urgent

Mathematics
1 answer:
kotegsom [21]3 years ago
6 0

Answer:

Below in bold.

Step-by-step explanation:

1) ( a^2 + b^2 = (a + b)^2 - 2ab

= 29 - 2(6)

= 29-12

= 17.

2).  (x - y)^2 = x^2 + y^2 - 2xy

so 20 = 18 - 2xy

2xy = 18-20 = -2

xy = -1.

3). 1/x + x = 7

(1/ x + x)^2 = 1/x^2  + x^2 +x/x + x/x

= 1/x^2 + x^2 + 2

But(1/x + x)^2 = 7^2 = 49

so 1/x^2 + x^2 + 2 = 49

so 1/x^2 + x^2 = 49 - 2 = 47.

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F(1)=15<br> f(n)=f(n-1)*n<br> What does f(2) equal?
Arlecino [84]

Answer:

f(2) =30

Step-by-step explanation:

f(1)=15

f(n)=f(n-1)*n

Put in n=2

f(2)=f(2-1)*2

     = f(1) *2

      = 15*2

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3 0
3 years ago
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3 3/4 divide 2 1/12<br><br><br> sssss
dybincka [34]
3 3/4 divide 2 1/12 = 1.8


8 0
3 years ago
Simplify 5^3/5^7 leaving your anwser in index form
Wewaii [24]

Steps:

Simplify:

5³/5⁷

= 5³/5⁷

= 5*5*5/ 5*5*5*5*5*5*5

=1/5⁴

=1/625 (Decimal: 0.0016)

Steps by Step:

5³/5⁷

=125/5⁷

=125/78125

=1/625

Answer:   =1/625       (Decimal: 0.0016)

Please mark brainliest

<em><u>Hope this helps.</u></em>

6 0
3 years ago
Trying to find the y-intercept and got -24. But the graph given doesn't have a number on the y-axis going all the way down to -2
mario62 [17]

Answer:

y = 6x - 24

Step-by-step explanation:

Slope intercept form: y = mx + b.

Fill in x, y, and the slope to solve for b as follows:

First find the slope.

60 - 6

14 - 5

54/9

Slope = 6

y = 6x + b

(6) = 6(5) + b

6 = 30 + b

Subtract 30 from both sides.

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4 0
3 years ago
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Terbium-160 has a half-life of about 72 days.
Nastasia [14]
For the half-life of a certain substance, the equation that would best represent the scenario is,
                             At = Ao(0.5^t/n)
where At is the amount at any time t, Ao is the original amount, and n is half-life. Substituting the known values,
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Thus, after 396 days, there will only be 4.86 mg of Terbium-160. 
5 0
3 years ago
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