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Dennis_Churaev [7]
3 years ago
10

The ratio of boys to girls in Ella’s grade is 3 to 4. The ratio of boys to girls in Minh’s grade is 4 to 5. Each grade has a tot

al of 20 girls.
Mathematics
1 answer:
Aneli [31]3 years ago
4 0

Answer:

In mih's school there are 100 boys

While in Ella's school there are 80 boys

Step-by-step explanation:

X*1/5=20

X=100

X*1/4=20

X=80

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Answer:

y=4x+1

Step-by-step explanation:

1. 4x-y=2

  -y=-4x+2   divide both sides by -1

  y=4x-2

2. y-y1=m(x-x1)

   y-(-3)=4(x-(-1))

    y+3=4x+4

    y=4x+4-3

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Parallel lines have the same, so the equation we are making should have the slope of 4.

 

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Help, please! 50points
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Answer:

23

Step-by-step explanation:

they add five

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Marcy has earned 18 rewards points at the movie theatre and will earn 3 points for each additional movie. Which equation represe
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Step-by-step explanation:

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3 years ago
The binomial (2x+9) is a factor of a quadratic expression 14x^2+57x-27 what is the other factor of the expression
Blizzard [7]

Answer:

Input:

14 x^2 + 57 x - 27

Plots:

Geometric figure:

parabola

Alternate forms:

(7 x - 3) (2 x + 9)

x (14 x + 57) - 27

14 (x + 57/28)^2 - 4761/56

Roots:

x = -9/2

x = 3/7

Polynomial discriminant:

Δ = 4761

Properties as a real function:

Domain

R (all real numbers)

Range

{y element R : y>=-4761/56}

Derivative:

d/dx(14 x^2 + 57 x - 27) = 28 x + 57

Indefinite integral:

integral(-27 + 57 x + 14 x^2) dx = (14 x^3)/3 + (57 x^2)/2 - 27 x + constant

Global minimum:

min{14 x^2 + 57 x - 27} = -4761/56 at x = -57/28

Definite integral:

integral_(-9/2)^(3/7) (-27 + 57 x + 14 x^2) dx = -109503/392≈-279.344

Definite integral area below the axis between the smallest and largest real roots:

integral_(-9/2)^(3/7) (-27 + 57 x + 14 x^2) θ(27 - 57 x - 14 x^2) dx = -109503/392≈-279.344

Step-by-step explanation:

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