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SVETLANKA909090 [29]
3 years ago
13

Factor completely 21x^3+35x^2+9x+15

Mathematics
1 answer:
Alexxandr [17]3 years ago
4 0
Last choice. Work is show me below

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In a museum, Nick is looking at a famous painting through a mirror at an angle of 58 degrees Find the angle the painting makes w
Anna [14]

here's your answer

The angle of incidence of the painting is 58°, one property of mirrors is angle of incidence = angle of reflection. Therefore angle of reflection the painting makes with the mirror is 58°.

HOPE IT HELPS....

6 0
3 years ago
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The width of the rectangle is five feet less than the length. If the perimeter of the rectangle is 34 feet find both dimensions
Lyrx [107]

Answer:

length = 11 ft, width = 6 ft

Step-by-step explanation:

Let w be the width, l be the length and p the perimeter. You can write down the following equations:

1. w = l - 5

2. p = 2*(w + l)

Now you have two equations with two unknown.

Plugging eq.1 in eq.2:

p = 2*(l-5 + l)

p = 2*(2*l - 5)

p = 4*l - 10

Remember p = 34

34 = 4*l - 10

4*l = 44

l = 11

Using eq.1 to solve for w:

w = 11 - 5

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3 years ago
In a cross-country race with 35 participants , the mean finish time was 21 minutes . Which statement must be true?
antiseptic1488 [7]
The answer is c, all others can be ruled out.
6 0
3 years ago
The distances between three cities on a map are 45 miles, 56 miles, and 72 miles. Do the positions of
ollegr [7]

Answer:

The position of the three cities do not form a right-triangle.

Step-by-step explanation:

There are three cities on a map (say A, B, and C).

Now, the distances between them are 45 miles, 56 miles, and 72 miles.

i.e. AB= 45 miles, BC= 56 miles and CA =72 miles.

If the three cities A, B, C form a right-angled triangle on the map, then applying Pythagoras Theorem AB² +BC² =AC²

or, AC= √(AB² +BC²) must be satisfied.

Now, right-hand side of the above equation =√(45²+56²) =71.84 ≠ 72 (AC)

Hence, Right-hand side ≠ Left-hand side.

Therefore, the positions of the three cities do not form a right triangle. (Answer)  

6 0
4 years ago
Please help! I just got back from vacation and we just started doing ratios I have no idea what to doooo!
vladimir1956 [14]
1:2
because red:black = 10:20 and simplifies to 1:2
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3 years ago
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