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xxTIMURxx [149]
3 years ago
6

A stunt plane ended a maneuver 700 feet above the top of a skyscraper, after starting 300 feet above the top of that same skyscr

aper. What was the stunt plane's change in altitude?
Mathematics
1 answer:
satela [25.4K]3 years ago
6 0
400 ft  decrease in altitude <span />
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Answer:

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What method would you choose to solve the equation 2x^2-7=9
Margaret [11]
Here is one way to solve for x.

Step 1)  2x^2-7=9

Step 2)  2x^2-7+7=9+7

Step 3)  2x^2=16

Step 4)  (2x^2)/2=16/2

Step 5)  x^2=8

Step 6)  sqrt(x^2)=sqrt(8)

Step 7)  |x|=sqrt(8)

Step 8)  x=sqrt(8) or x=-sqrt(8)

-------------------------------------

Below are explanations/reasons to each of the steps above.

Step 1) Original equation

Step 2) Add 7 to both sides

Step 3) Combine like terms

Step 4) Divide both sides by 2

Step 5) Simplify

Step 6) Apply the square root to both sides. The notation "sqrt" is shorthand for "square root"

Step 7) Use the rule that sqrt(x^2) = |x| for all real numbers x

Step 8) Use the rule that if |x| = k then x = k or x = -k for some fixed number k.

-------------------------------------

The two solutions are
x = sqrt(8) or x = -sqrt(8)

3 0
3 years ago
Square measures 8 m on each side if each side is written by 1/4 of eight originally the premiere of the new square will be blank
Digiron [165]

Step-by-step explanation:

so, if I understand this correctly, the original square had a side length of 8 m.

now we transform this square into one with side length 1/4×8 = 8/4 = 2 m.

and the questions are what are the perimeter and the area of that new (smaller) square ?

the perimeter of a square is

4× side length = 4×2 = 8 m

the area of a square is

side length ² = 2² = 4 m²

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2 years ago
The mean absolute deviation is 1.74 inches for the badminton team and 3.02 inches for the basketball team. Which of the followin
maxonik [38]
I believe that answer is B. (The second one)
Hope this helped !!
5 0
3 years ago
Find AB, given that line AD is the perpendicular bisector of BC
astraxan [27]

Answer:

AB = 9

Step-by-step explanation:

The perpendicular bisector divides Δ ABC into 2 congruent triangles, that is

Δ ABD ≅ Δ ACD , then

AB = AC = 9

5 0
3 years ago
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