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3 years ago

ILL MARK BRAINLIEST FOR REAL ANSWERS

Mathematics

2 answers:

Llana [10]3 years ago

8 0

The answer should be (0, 0).
I'm not sure. Hope it helps.

ryzh [129]3 years ago

7 0

The answer is 0,0 because the linear relationship states that it has to be on a plane of f(x)

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Given f(x)=2x2−5x−3 and g(x)=2x2+x . What is (fg)(x) ?

gizmo_the_mogwai [7]

Answer:

fourth option

Step-by-step explanation:

note that ( $\frac{f}{g}$ )(x)x) = $\frac{f(x)}{g(x)}$

$\frac{f(x)}{g(x)}$ = $\frac{2x^2-5x-3}{2x^2+x}$ ← factorise numerator/ denominator

= $\frac{(x-3)(2x+1)}{x(2x+1)}$ ← cancel the common factor (2x + 1)

= $\frac{x-3}{x}$ where x ≠ 0, - $\frac{1}{2}$

4 0

3 years ago

3 x A = 30 + 30 it’s a 3rd grade problem but don’t know the answer

xenn [34]

Answer: A=20

Step-by-step explanation:

3×A=30+30............eqn 1

3A=60

A=60/3

A=20

Substitute A=20 into equation 1

3x20= 30+30

8 0

3 years ago

What is the estimated margin of error, using standard deviation?

OLEGan [10]

Find the mean ( average):
105 + 104 + 110 + 112 + 114 + 106 + 108 +109 = 868
Mean = 868 / 8 = 108.5

Standard deviation:
108.5 - 105 = 3.5, 3.5^2 = 12.25
108.5 - 104 = 4, 4^2 = 16
110 - 108.5 = 1.5, 1.5^2 = 2.25
112 - 108.5 = 3.5, 3.5^2 = 12.25
114 - 108.5 = 5.5, 5.5^2 = 30.25
108.5 - 106 = 2.5, 2.5^2 = 6.25
108.5 - 108 = 0.5, 0.5^2 = 0.25
109 - 108.5 = 0.5, 0.5^2 = 0.25

12.25 + 16 +2.25 + 12.25 + 30.25 +6.25+0.25+0.25 = 79.75
79.75/8 = 9.96875, SQRT(9.96875) = 3.1573

Standard Deviation = 3.1573

108.8 +/- 1.96 *(3.1573/sqrt(8) = 110.687 and 106.312

110.687 - 108.5 = 2.19
108.5 - 106.312 = 2.19

Margin of error = +/- 2.19

3 0

3 years ago

Can somebody please help me with question number 1

inysia [295]

Answer:

1a: 6.283

b: 51.313

c: 285.1

Step-by-step explanation:

Area of a sector = (angle/360)πr²

Area=(45/360)π(4²)=6.283

Area=(120/360)π(7²)=51.313

Area=(270/360)π(11²)=285.1

6 0

3 years ago

What is the mean of -9,-5,-4,-4,-2,0,1,2,3,5

IrinaK [193]

Answer: - 1.3

Step-by-step explanation: I believe that it's -1.3 if you're referring to the arithmetic mean.

(1) Take the sum of -9, -5, -4, -4, -2, 0, 1, 2, 3, 5 and simplify it to -13

(2) Count the number of terms in the data set.

{-9, -5, -4, -4, -2, 0, 1, 2, 3, 5}

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10} - The number of terms in the data set is 10.

(3) Divide the sum by the number of terms and simplify.

-13 / 10 = -1.3 (simplified)

8 0

3 years ago