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Anastaziya [24]
3 years ago
11

4x - 2y = 5 and y = 3x - 1

Mathematics
1 answer:
Talja [164]3 years ago
7 0

Answer:

4x_2y=5

4x=5+2y

x=5+2y/5

now, y=3x_1

putting value of x in second question

In this way you can do

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Eduardo thinks of a number between 1 and 20 that has exactly 5 factors.What number is he thinking of?
Leni [432]

Eduardo is thinking of the number  16 .
3 0
3 years ago
Why does sin54°≈0.809≈cos36° in a right triangle?
allsm [11]

9514 1404 393

Answer:

A

54° and 36° are complementary angles in the same right triangle. sin54° is the ratio of the opposite leg and the hypotenuse and cos36° is the ratio of the adjacent leg and the hypotenuse. In this triangle, the opposite leg of 54° and the adjacent leg of 36° are the same leg in the triangle.

Step-by-step explanation:

The answer explains itself.

The sum of angles in a triangle is 180°. When one of the angles is 90°, the sum of the other two angles is also 90°. That means those two acute angles are <em>complementary</em> (not supplementary).

The mnemonic SOH CAH TOA reminds you that ...

  Sin = Opposite/Hypotenuse

  Cos = Adjacent/Hypotenuse

7 0
2 years ago
Evaluate. Pay close attention to all brackets and signs. [-2.99] + [2.99]
Elena-2011 [213]
Alright, so [-2.99] is -2.99, and [2.99] is 2.99, so -2.99+2.99=0
3 0
3 years ago
Read 2 more answers
Shianne is looking up at the flag on the top of the sailboat she is sailing on. She is sitting 16 feet from the bottom
storchak [24]

Answer:

height of the flag from the bottom of the boat ≈ 32 ft (nearest foot)

Step-by-step explanation:

She is on her boat and the angle of elevation to the top of the flag is 58°. Her eyes her 6 ft above the bottom of the boat she is sailing on. The height of the flag from the bottom of the boat is the sum of the height of the flag and the remaining height from the horizontal line of sight upward to the flag top.

A right angle triangle was formed Shianne line of sight. The angle from her line of sight is 58° from the horizontal. Therefore,

the adjacent side of the triangle formed is 16 ft which is the distance from the boat to the flag.

adjacent side = 16 ft

opposite angle = ?

using tangential ratio

tan 58° = opposite/adjacent

tan 58° = h/16

cross multiply

h = 16 × 1.60033452904

h = 25.6053524647

height of the flag from the bottom of the boat = 25.6053524647  + 6 = 31.6053524647

height of the flag from the bottom of the boat ≈ 32 ft(nearest foot)

7 0
2 years ago
What are the coordinates of A’ after reflecting across the line x = 3?
bazaltina [42]

Answer:

(3,2)

Step-by-step explanation:

A: (3,2)

Since A lies on the mirror line, it will mapped onto itself

A': (3,2)

3 0
3 years ago
Read 2 more answers
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