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2 years ago

WATU

Mathematics

1 answer:

blondinia [14]2 years ago

7 0

Answer:

12.24

Step-by-step explanation:

13.48-1.24=12.24

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$V=\dfrac{5-x}{x(x-2)}$
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2 years ago

Write 61/9 as a mixed number

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Two lines, A and B, are represented by the equations given below!

lara [203]

Answer:

The solutions to the system of equations are:

$y=-8,\:x=-4$

Thus, option C is true because the point satisfies BOTH equations.

Step-by-step explanation:

Given the system of the equations

$\begin{bmatrix}y=x-4\\ y=3x+4\end{bmatrix}$

Arrange equation variables for elimination

$\begin{bmatrix}y-x=-4\\ y-3x=4\end{bmatrix}$

$y-3x=4$

$-$

$\underline{y-x=-4}$

$-2x=8$

$\begin{bmatrix}y-x=-4\\ -2x=8\end{bmatrix}$

solve for x

$-2x=8$

Divide both sides by -2

$\frac{-2x}{-2}=\frac{8}{-2}$

$x=-4$

$\mathrm{For\:}y-x=-4\mathrm{\:plug\:in\:}x=-4$

$y-\left(-4\right)=-4$

$y+4=-4$

$y=-8$

The solutions to the system of equations are:

$y=-8,\:x=-4$

Thus, option C is true because the point satisfies BOTH equations.

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2 years ago

The grades on a language midterm at Oak Academy are roughly symmetric with = 67 and 0 = 2.5. Ishaan scored 70 on the exam. Find

rodikova [14]

Answer: 1.2

Step-by-step explanation:

Let X denotes the grades on a language midterm at Oak Academy.

As per given ,

X follows normal distribution ( because it has symmetric graph)

$\mu=67,\ \ \ \ \sigma= 2.5$

Formula for z : $z=\dfrac{X-\mu}{\sigma}$

For X = 70, we have

$z=\dfrac{70-67}{2.5}=\dfrac{3}{2.5}=1.2$

Hence, the z-score for Ishaan's exam grade = 1.2

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2 years ago