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Stolb23 [73]
3 years ago
11

Tell what number must be added to complete the square x^2+16x__

Mathematics
1 answer:
Talja [164]3 years ago
8 0
2 will work.
if you use two the answer is.
(x-4)(x+4)
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In rectangle nice, the base is 2x and the height is x+1. the perimeter is 53 feet. find the height
mihalych1998 [28]
The perimeter equation for a rectangle is two times the base plus two times the height.
2B + 2H=P

Plug in the known values and solve for x.
2(2x) + 2(x+1)=53
4x+2x+2=53
6x=51
x=8.5

Now that we know what x is, put it back into the formula for the height of the rectangle to find the final answer.
H= x+1
H=8.5+1
H=9.5 ft
4 0
2 years ago
An elevator moving down passes its neighbor, an elevator moving up. Their speed relative to one another is 8 m/s. What is the ve
ANTONII [103]
LiftA= u m/s ( upwards)
LiftB= -u m/s(downward)

Velocity A relative to B= V lift A- V lift B=8m/s
u-(-u)=8
u=4m/s
Lift A= 4 m/sec
Lift B= -4m/sec
For someone standing on first floor will be stationary W.r.t to the lift.
V lift A relative to Man= V liftA - V man= 4m/s

V lift B relative to Man= V lift B- V Man= -4 m/s
5 0
3 years ago
Read 2 more answers
If x=-5 what is the value of x^2-1/x+1? A. 6 b. -4 c. 4 d. 5 4/5 e. 19 <br> need answers asap
xxTIMURxx [149]

Answer:

The answer is -6 but its not in the option

Step-by-step explanation:

\frac{ {x}^{2} - 1 }{ x  + 1}

Let x = -5

[(-5)²-1]/(-5+1)

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2 years ago
What is the slope of this function. f(x)=-3x+5
Vanyuwa [196]
The slope would have to be -3
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3 years ago
What should be added 0.7 to get 1​
sveticcg [70]

Answer:

0.3

Step-by-step explanation:

x is the number to be added to 0.7 to have a sum of 1.

0.7 + x = 1

x = 1 - 0.7

x = 0.3

5 0
3 years ago
Read 2 more answers
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