22=7+3x please explain. I think you do -22 on both sides

2 answers:

7 0

No, 22 should stay on its own side but x needs to be alone. so start on the 7+3x side and get 22 alone.
22=7+3x should start with subtracting seven instead of 22 then dividing by 3 and you will find the answer

Jet001 [13]3 years ago

3 0

22=7+3x
22-7 = 3x
15=3x
15/3=x
5=x

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Mark and Damien were in a hot dog contest. Mark ate 12 hot dogs. Damien ate 4/6 as many hot dogs as Mark. How many hot dogs did

mario62 [17]

Answer:

Step-by-step explanation:

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7 0

3 years ago

Could someone help me rnnn?

GuDViN [60]

Answer:

vertex = (0, -4)

equation of the parabola: $y=3x^2-4$

Step-by-step explanation:

Given:

y-intercept of parabola: -4
parabola passes through points: (-2, 8) and (1, -1)

Vertex form of a parabola: $y=a(x-h)^2+k$

(where (h, k) is the vertex and $a$ is some constant)

Substitute point (0, -4) into the equation:

$\begin{aligned}\textsf{At}\:(0,-4) \implies a(0-h)^2+k &=-4\\ah^2+k &=-4\end{aligned}$

Substitute point (-2, 8) and $ah^2+k=-4$ into the equation:

$\begin{aligned}\textsf{At}\:(-2,8) \implies a(-2-h)^2+k &=8\\a(4+4h+h^2)+k &=8\\4a+4ah+ah^2+k &=8\\\implies 4a+4ah-4&=8\\4a(1+h)&=12\\a(1+h)&=3\end{aligned}$