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3 years ago

If n > 2 then n^2 > 4. Is this true or false, if false then give a counterexample?

Mathematics

1 answer:

aalyn [17]3 years ago

5 0

Answer:

True. No matter if n is a negative or positive, it will always be less than 4.

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Analyze the following pattern 1,2,5,10,7

vodka [1.7K]

Answer:

an + 1 = an + 2n -1 ,a 1=1

a8= 50

Step-by-step explanation:

an+1=an+2n-1,a1=1

a6=a5+2x5-1

a6=26

a7=26+11

a7=37

a8=37+13

a8=50

6 0

3 years ago

This was given to me during a summative test and the teacher didn't bother giving me the correction. I just cannot figure it out

Dmitry [639]

Base be y

ATQ

$\\ \sf\longmapsto xy=6050\dots 1$

$\\ \sf\longmapsto 2(x+y)=220\implies x+y=110\dots 2$

Now

$\\ \sf\longmapsto (x+y)^2=x^2+y^2+2xy$

$\\ \sf\longmapsto 110^2-2(6050)=x^2+y^2$

$\\ \sf\longmapsto 12100-12100=x^2+y^2$

$\\ \sf\longmapsto x^2+y^2=0\dots(3)$

From all equations

$\\ \sf\longmapsto (x-y)^2=x^2+y^2-2xy$

$\\ \sf\longmapsto (x-y)^2=0-2(6050)$

$\\ \sf\longmapsto (x-y)^2=-12100$

$\\ \sf\longmapsto (x-y)=110\dots(4)$

Now

Adding 3 and 4

$\\ \sf\longmapsto 2x=220$

$\\ \sf\longmapsto x=110m$

One side won't be covered hence

y=2(110)=220m

7 0

2 years ago

Read 2 more answers

Can u guys please help me

blsea [12.9K]

Answer:

60.69cm^2

Step-by-step explanation:

5.1^2 = 26.01

5.1/2 = 2.55

2.55 × 5.95 = 15.1725

15.1725×4 = 60.69

60.69 + 26.01 = 60.69cm^2 nice

4 0

1 year ago

How do you write 7.25 in word form?

babymother [125]

Seven and twenty five hundredths, or seven and a quarter

4 0

2 years ago

Please help me i need an answer

umka2103 [35]

3 / 5 = (x+1) / (y-2)
↓
↓ multiply by 5 / 3
↓
1 = 5 * (x+1) / 3 * (y-2)
↓
↓ move and simplify
↓
5x + 5 = 3y - 6
↓
↓ minus 5
↓
5x = 3y - 11
↓
↓ divide by 5
↓

Answer : x = (3y - 11) / 5

4 0

3 years ago