2 years ago

10. Which expression is represented by the model below? + o

Mathematics

1 answer:

galben [10]2 years ago

5 0

I remember doing this one and its c

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The x-intercepts of a parabola are 5 and -7. What is the equation of the axis of symmetry?

zloy xaker [14]

X=-1
The axis of symmetry will be directly in the middle of the intercepts.

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3 years ago

The position function for a free-falling object is s(t) = -16t^2 + vt +5. A ball is thrown upward from the top of a 400-foot bui

mixer [17]

Answer:

6.21 seconds

Step-by-step explanation:

The position function of a free-falling object is,

$s(t) = -16t^2+v_0t+s_0$

Where,

$s_0$ = initial height of the object,

$v_0$ = initial velocity of the object,

Here,

$s_0=400\text{ feet}$

$v_0=35\text{ feet per sec}$

Hence, the height of the ball after t seconds,

$s(t)=-16t^2+35t+400$

When s(t) = 0,

$\implies -16t^2+35t+400=0$

$t=\frac{-35\pm \sqrt{35^2-4\times -16\times 400}}{2\times -16}$

$t=\frac{-35\pm \sqrt{1225+25600}}{-32}$

$\implies t\approx -4.02\text{ or }t\approx 6.21$

∵ Time cannot be negative,

Hence, after 6.21 seconds the ball will reach the ground.

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3 years ago

He first draft of the civil rights act was proposed by

maksim [4K]

The first draft of the civil rights act was proposed by 3. John F. Kennedy

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3 years ago

I NEED HELP SO BAD PLEASE!!!!!!!!!!!

inysia [295]

Answer:

I think its 6 :)

Step-by-step explanation:

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3 years ago

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Please help me solve this

andre [41]

Answer:

Step-by-step explanation:

This number is much larger than 1. You need to start at the decimal and move left (that's how scientific notation works for numbers larger than 1.)

So the answer is 1.0054 * 10 ^7

The person doing this started at the 1 and moved right until he/she hit the decimal. Wrong direction.

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2 years ago