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KIM [24]
2 years ago
12

Help with this question please

Mathematics
2 answers:
Delvig [45]2 years ago
7 0
Number of chores is independent, the other is dependent
lara [203]2 years ago
5 0
Independent variable (often denoted by x ) whose variation does not depend on that of another.
Dependent variable (often denoted by y ) whose value depends on that of another.

Independent- c (number of chores)
Dependent- d (number of dollars)

Depending on how many chores you complete will determine how much money you will earn.
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Solve the system of equations.<br> <img src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7By%3D220x-160%7D%20%5Catop%20%7By%3
Leni [432]

\begin{cases} y=220x-160\\ y=20x^2-400 \end{cases}\qquad \qquad \stackrel{\textit{substituting on the 2nd equation}}{\stackrel{\textit{\Large y}}{220x-160}~~ = ~~20x^2-400} \\\\\\ -160=20x^2-220x-400\implies 0=20x^2-220x-240 \\\\\\ 0=20(x^2-11x-12)\implies 0=x^2-11x-12 \\\\\\ 0=(x-12)(x+1)\implies x= \begin{cases} 12\\ -1 \end{cases}

\dotfill\\\\ x=12\qquad \qquad \stackrel{\textit{substituting on the 1st equation}}{y=220(12)-160}\implies y=2480 \\\\\\ x=-1\qquad \qquad \stackrel{\textit{substituting on the 1st equation}}{y=220(-1)-160}\implies y=-380 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (12~~,~~2480)\qquad (-1~~,~~-380)~\hfill

4 0
2 years ago
5y-30=-5y+30 and also can you show the steps :}
KatRina [158]

5y-30=-5y+30

add 30 to both sides

5y = -5y+60

add 5y to both sides

10y = 60

divide both sides by 10

y = 6

<em>hope this helps!</em>

8 0
3 years ago
Find the solutions to x² = 12.
Novosadov [1.4K]

Answer:

x = \pm 2\sqrt3

Step-by-step explanation:

Hello!

Let's use the square root property to solve this question

Solve:

  • x^2 = 12
  • \sqrt{x^2} = \sqrt{12}
  • x = \pm\sqrt{12}
  • x = \pm \sqrt{4 * 3}
  • x = \pm 2\sqrt3

The answer is option A: x = ±2√3

3 0
2 years ago
A soccer ball is kicked toward the goal. The height of the ball is modeled by the function h(t) = −16t2 + 48t where t equals the
Vitek1552 [10]

Answer:

Last one

t = 1.5; it takes 1.5 seconds to reach the maximum height of 36 meters.

Step-by-step explanation:

h(t) = −16t² + 48t

h(t) = -16(t² - 3t)

h(t) = -16(t² - 2(t)(1.5) + 1.5² - 1.5²)

h(t) = -16(t - 1.5)² + 36

Axis of symmetry:

t = 1.5

Max height = 36

7 0
2 years ago
Consider the figure below. What would be the new coordinates of point P if the figure is translated (2, -3) and then reflected a
zheka24 [161]

Answer:

(2,3)

Step-by-step explanation:

3 0
3 years ago
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