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Bogdan [553]
3 years ago
14

(01.04 NC The elevation of oty is 80 feet below sea level: the elevation of city is 18 feet below sea level. The elevation of pa

rt A: write an expression to represent the elevation in feet of city (5 points) Part B. solve the expression and explain why the answer is negative or positives points) BU Font Type here to search​
Mathematics
1 answer:
ser-zykov [4K]3 years ago
6 0

Step-by-step explanation:

how the elevation of city can be seen below the sea level

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I WILL GIVE BRAINLIEST PLEASE DO UPSIDE OWN CAKE METHOD AND SIMPIFLY
emmasim [6.3K]

Answer:

6 over 25

Step-by-step explanation

I dont what the method yur talking about but the answer

3 0
3 years ago
Two boats depart from a port located at (–8, 1) in a coordinate system measured in kilometers and travel in a positive x-directi
miss Akunina [59]

Answer:

\left\{\begin{array}{l}y=-\dfrac{1}{9}x^2 +\dfrac{2}{9}x+\dfrac{89}{9}\\ \\y=\dfrac{1}{8}x^2 -7\end{array}\right.

Step-by-step explanation:

1st boat:

Parabola equation:

y=ax^2 +bx+c

The x-coordinate of the vertex:

x_v=-\dfrac{b}{2a}\Rightarrow -\dfrac{b}{2a}=1\\ \\b=-2a

Equation:

y=ax^2 -2ax+c

The y-coordinate of the vertex:

y_v=a\cdot 1^2-2a\cdot 1+c\Rightarrow a-2a+c=10\\ \\c-a=10

Parabola passes through the point (-8,1), so

1=a\cdot (-8)^2-2a\cdot (-8)+c\\ \\80a+c=1

Solve:

c=10+a\\ \\80a+10+a=1\\ \\81a=-9\\ \\a=-\dfrac{1}{9}\\ \\b=-2a=\dfrac{2}{9}\\ \\c=10-\dfrac{1}{9}=\dfrac{89}{9}

Parabola equation:

y=-\dfrac{1}{9}x^2 +\dfrac{2}{9}x+\dfrac{89}{9}

2nd boat:

Parabola equation:

y=ax^2 +bx+c

The x-coordinate of the vertex:

x_v=-\dfrac{b}{2a}\Rightarrow -\dfrac{b}{2a}=0\\ \\b=0

Equation:

y=ax^2+c

The y-coordinate of the vertex:

y_v=a\cdot 0^2+c\Rightarrow c=-7

Parabola passes through the point (-8,1), so

1=a\cdot (-8)^2-7\\ \\64a-7=1

Solve:

a=-\dfrac{1}{8}\\ \\b=0\\ \\c=-7

Parabola equation:

y=\dfrac{1}{8}x^2 -7

System of two equations:

\left\{\begin{array}{l}y=-\dfrac{1}{9}x^2 +\dfrac{2}{9}x+\dfrac{89}{9}\\ \\y=\dfrac{1}{8}x^2 -7\end{array}\right.

7 0
3 years ago
Read 2 more answers
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DerKrebs [107]

The answer to your question is k and m are both 9

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3 years ago
Using the equation below, find the slope and y-intercept of the equation it would create.
IRISSAK [1]

Answer: m=-1, b=-2

Step-by-step explanation:

4 0
3 years ago
If a= lw and if l= 1.5 and w = 0.75 what does a equal
stira [4]
Oi :)

a= l*w
a=1.5 * 0.75
a= 1.125
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3 years ago
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