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3 years ago

I need help big time. What are the step by step math problem to (-3+2)^2 to get the answer?

Mathematics

2 answers:

LekaFEV [45]3 years ago

5 0

You start by doing the ones in the parentheses which gives you (-1)^2 then the complete answer is 1 very simple

Alexxx [7]3 years ago

4 0

The answer is (-3+2)^2 =1

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The height (feet) of an object moving vertically is given by s= (-16t^2)+(208t)+(156), where t is in seconds.

OverLord2011 [107]

Answer:

The object's velocity at t = 7 is -16 ft/s

The maximum height is 832 ft and it occurs when $t=\frac{13}{2}$

Step-by-step explanation:

From the information given, the equation of motion of the object is

$s(t)= -16t^2+208t+156$

For any equation of motion s(t), the instantaneous velocity at time t is given by

$v(t)=\frac{ds}{dt}$

(a) To find the object's velocity at t = 7, you must:

$v(t)=\frac{d}{dt}(-16t^2+208t+156)\\\\v(t)=-\frac{d}{dt}\left(16t^2\right)+\frac{d}{dt}\left(208t\right)+\frac{d}{dt}\left(156\right)\\\\v(t)=-32t+208+0\\\\v(t)=-32t+208$

Next, we evaluate when t = 7

$v(7)=-32(7)+208=-224+208\\\\v(7)=-16$

The object's velocity at t = 7 is -16 ft/s

(b) <em>To find the maximum of a function we always use the derivative of the function and we set it equal zero to find the</em><em> critical points.</em>

To find the maximum height and when it occurs, we set the velocity function equal to 0 and solve for t.

$-32t+208=0\\\\-32t+208-208=0-208\\\\-32t=-208\\\\\frac{-32t}{-32}=\frac{-208}{-32}\\\\t=\frac{13}{2}$

Next, we substitute this value into the equation of motion to find the maximum height

$s(\frac{13}{2})= -16(\frac{13}{2})^2+208(\frac{13}{2})+156\\\\s(\frac{13}{2})=-676+1352+156)=832$

The maximum height is 832 ft and it occurs when $t=\frac{13}{2}$

6 0

3 years ago

D C с Determine the area of the rectangular ABCD with AB=5cm and BC=3cm. A 5cm B 3 ст. C С D

soldier1979 [14.2K]

Answer:

15cm2

Step-by-step explanation:

Area of rectangle = l×b

l=5cm, b=3cm

Area= 5×3 =15cm2

6 0

3 years ago

What is 2 copies of 4 tenths?

murzikaleks [220]

2 copies of 4 tenths is 8 tenths, or 80.

Please make brainliest answer :^)

4 0

4 years ago

Read 2 more answers

Can someone help I’m confused

exis [7]

Answer:

D and E

Step-by-step explanation:

Let's double check:

D. 9 ÷ 3 = 3

E. 4 × 9 = 36

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Have a great summer :)

3 0

3 years ago

Read 2 more answers

The table below shows the surface area y, in square feet, of a shrinking lake in x days:

andreyandreev [35.5K]

Based on the data, the most likely correlation coefficient would be -1.
The slope between 20 and 30 days is -1, and it represents the change in the surface area of the lake per day.
The data represents correlation, not causation.

Since the data would form a perfectly straight line through the points, the correlation coefficient would be -1 for a perfect decreasing fit.
To find the slope, find the change in the surface area between those days, the change in the days, and write it as surface area/days: 80-90=-10; 30-20=10; -10/10=-1
This is not causation because there could be lurking variables we cannot see.

6 0

3 years ago