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Sati [7]
3 years ago
11

Help I can’t figure it out.

Mathematics
1 answer:
polet [3.4K]3 years ago
7 0
The discount price would be $21.98

The final price would be $124.56

yw, mwah
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Geometry help! Please prove the following is a square with full explanation, I'm really lost.
Hoochie [10]

We have to show that this is a square, meaning all the sides are perpendicular and the same distance.  

A(3,4), B(2,-2), C(-4,-1), D(-3,5)

For each side we calculate the squared distance and the slope.  We don't have to bother to take the square root.  We'll subtract the points first because that difference, called the direction vector, goes into both the calculation of the slope and of the distance.

AB=B-A=(2 - 3, -2 - 4) = (-1, -6).   slope=-6/-1=6  AB²=(-1)²+(-6)²=37

BC=C-B=(-6, 1).  slope=1/-6=-1/6.   BC²=(-6)²+1²

CD=D-C=(1, 6).   slope=6/1=6    CD²=1²+6²=37

DA=A-D=(6,-1)   slope=-1/6     DA²=37

We see the negative reciprocal slopes, alternating between 6 and -1/6, indicating perpendicular sides.  We see they all have squared distance 37.  Equal perpendicular sides proves its a square.

If we do these problems enough we learn:  There's no point taking the square root.  In fact, there's really no point computing the slopes and the squared distances; we can see it's a square from the pattern of the direction vectors of the sides:  (-1, -6) (-6, 1) (1, 6) (6,-1)

5 0
4 years ago
PLEASE HELP WILL MARK BRAINLIEST THANK YOU
slava [35]

Answer:

91 degrees

Step-by-step explanation:

they are vertical angles which means they are congruent

8 0
3 years ago
Please help me with this I would give you 50 points.<br> FEET 1 4 5<br> INCHES 24 36
kipiarov [429]

Answer: feet: 1, 2, 3, 4, 5

          inches: 12, 24, 36, 48, 60

Step-by-step explanation:

There are 12 inches in a foot, therefore if you have 1 foot you have 12 inches, if you have 2 feet you have 24 inches becauase 2*12 = 24 and so on...

6 0
2 years ago
Read 2 more answers
Which expression are equivalent to the given expression square root of 40
pickupchik [31]
I need picture!!!!!!!!!!
7 0
3 years ago
Help with number 16 (15 points!)
masha68 [24]

Answer:

-5≥x≤-1

Step-by-step explanation:

comment if you would like an explanation for this.

6 0
3 years ago
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