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grandymaker [24]
3 years ago
6

Factor completely 4u^2 + 28u + 49

Mathematics
1 answer:
nata0808 [166]3 years ago
3 0
4u^2+28u+49=4u^2+14u+14u+49=2u(u+7)+7(u+7)=\\ \\=(u+7)(2u+7)
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How do you do this ??????????????????????
kicyunya [14]

Answer:

b

Step-by-step explanation:

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6 0
3 years ago
You are situated 300 feet from the base of Tower Glitz Plaza watching an external elevator descend down the side of the building
nordsb [41]

Answer:

18.66 ft/s

Step-by-step explanation:

The distance between you and the elevator is given by:

h=\sqrt{x^2+y^2}

The rate of change for the distance between you and the elevator is given by:

\frac{dh}{dt}=\frac{dh}{dy}*\frac{dy}{dt}

-16=\frac{dh}{dy}*\frac{dy}{dt}

\frac{dh}{dy}=\frac{d}{dy} (\sqrt{x^2+y^2})\\

Applying the chain rule:

u=x^2+y^2\\\frac{dh}{dy}=\frac{d\sqrt u}{du} *\frac{du}{dy}\\\frac{dh}{dy}=\frac{1}{2\sqrt u} *2y\\\frac{dh}{dy}=\frac{y}{\sqrt {(x^2+y^2)}}

Therefore, at x=300 and y = 500, dy/dt is:

-16=\frac{y}{\sqrt {(x^2+y^2)}}*\frac{dy}{dt}\\-16=\frac{500}{\sqrt {(300^2+500^2)}}*\frac{dy}{dt}\\\frac{dy}{dt}=-18.66\ ft/s

The elevator is descending at 18.66 ft/s.

7 0
3 years ago
Help me quickkkkkkk!!!!!!!!
nata0808 [166]

Answer:

a) G    

b) C

Step-by-step explanation:

3 0
2 years ago
What s the domain of f(x)=3x-2
Dmitry_Shevchenko [17]
Domain of: 3x-2

Solution: -Inf < x < Inf

Interval Notation: (-Inf, Inf)

Inf = Infinity (Replace "Inf" with the infinity symbol)

"-" = Negative sign
5 0
3 years ago
Read 2 more answers
find the y value for the point that splits segment GH in half of point G is located at (-3,5) and point H is located at (0,-2)
olganol [36]
Y=1.5 at the midpoint of GH. To do this you add the y values of the endpoints together and divide by two ----> 5-2= 3 ----> 3/2= 1.5

Hope this helps you !!
4 0
3 years ago
Read 2 more answers
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