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ad-work [718]
3 years ago
8

Expand and simplify: 3x(2x-3)^2 - (x+4)

Mathematics
1 answer:
Crazy boy [7]3 years ago
7 0
3x(2x-3)^2 - (x+4)=\\
3x(4x^2-12x+9)-x-4=\\
12x^3-36x^2+27x-x-4=\\
12x^3-36x^2+26x-4
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Help me please I wold appreciated it
algol13

Answer:

BD=7

ED=5

BE=7

AD=10

AE=5

Step-by-step explanation:

given CD = 7 you use that to find BD and BE because CD´s line length is the same as BD and BE

given BC = 5 you use that to find ED and AE and AD because BC is the same length as ED (they create the same triangle) and than given AE also equals 5 you add ED and AE to get AD

hope this helps

5 0
3 years ago
Kari is flying a kite. She releases 50 feet of string. What is the approximate difference in the height of the kite when the str
MakcuM [25]

Answer:

Step-by-step explanation:

The string of a kite forms a right angle triangle with the ground. The length of the string represents the hypotenuse of the right angle triangle. The height of the kite represents the opposite side of the right angle triangle.

To determine the height of the kite, we would apply the sine trigonometric ratio which is expressed as

Sin θ = opposite side/hypotenuse.

1) if the kite makes an angle of 25° with the ground, then the height, h would be

Sin 25 = h/50

h = 50Sin25 = 50 × 0.4226

h = 21.1 feet

2) if the kite makes an angle of 45° with the ground, then the height, h would be

Sin 45 = h/50

h = 50Sin45 = 50 × 0.7071

h = 35.4 feet

The approximate difference in the height of the kite is

35.4 - 21.1 = 14.3 feet

5 0
3 years ago
Enter the plan width for the rectangular room. Round your answer to the nearest tenth.
Jobisdone [24]

Answer:

350

Step-by-step explanation:

5x7x10=350

5 0
2 years ago
Which of the following is equivalent to 1/3(6x-12y) ?
harkovskaia [24]
1/3(6x-12y)
2x - 4y

the answer is A
5 0
3 years ago
Find the area of this parallelogram. Be sure to include the correct unit in your answer.
DedPeter [7]
19 yards maybe i dont know
7 0
3 years ago
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