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3 years ago

A 90% confidence interval is found to be (72,78) what is the margin of error

Mathematics

1 answer:

andrew-mc [135]3 years ago

5 0

Answer:

Step-by-step explanation:

i just took the quiz on a p e x!

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Will mark brainliest Let f(x)=x2+3x+2 .

PSYCHO15rus [73]

METHOD 1
f(3) = 20
f(4) = 30
f(5) = 42
f(6) = 56

rate of change
f(4)-f(3)=10
f(5)-f(4)=12
f(6)-f(5)=14

then the average of change is 10+12+14 /3 = 12

METHOD 2 --- faster

rate of change = f(6)-f(3) / 6-3
= (36+18+2)-(9+9+2) / 3
= 36/3 = 12

5 0

3 years ago

Write the equation of a line with an undefined slope and point (1, 7).

Sonja [21]

Answer:

The equation of straight line is x = 1

Step-by-step explanation:

<u>Step </u>:-

The equation of straight line having slope 'm' and passing through the point

$(x_{1} ,y_{1} )$ is $y-y_{1} = m (x-x_{1} )$

Slope of horizontal line(that is x-axis) is m = 0

slope of vertical line (that is y-axis) is m is not defined

The equation of straight line having slope is not defined and passing through the point (1,7).

$y-7 = \frac{1}{0} (x-1)$

cross multiplication we will get equation

$(y-7)(0)=1(x-1)$

x-1 = 0

The equation of straight line is x = 1

4 0

3 years ago

What the next number...2 7 8 3 12 9

ANEK [815]

-(17/30)n^5+(113/12)n^4-(173/3)n^3+ (1915/12) n^2- ( 5813/30)n +85

there fore term number 7 is .... -146/1=-146

5 0

3 years ago

F(x)=3x and g(x)=x+2 find fog(x),gof(x),fog(2),gof(2)

Gala2k [10]

Answer:

Step-by-step explanation:

fog(x)=f(g(x)) =f(x+2) =3⋅(x+2) =3x+6

gof(x)=g(f(x))=g(3x) =3x+2

gof(2)=3⋅2+2 =6+2 =8

fog(2)=3⋅(2+2) =3*2+6=12

8 0

3 years ago

What x 3 = 120.<br><br> 2x what = 120

VLD [36.1K]

Answer:

40×3 =120

2×60=120

Step-by-step explanation: have a good day

7 0

2 years ago