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Anna71 [15]
3 years ago
5

Hewp:(

Mathematics
2 answers:
stira [4]3 years ago
7 0

Answer:

210

Step-by-step explanation:

Using compatible numbers, which is the best estimate of (28.5)(7.1)?

JulsSmile [24]3 years ago
4 0

Answer:

300 i did 210 and got it wrong

Step-by-step explanation:

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You are flying a kite on a line that is 350 feet long. Let's suppose the line is perfectly straight (it never really is) and it
aliina [53]

Answer:

We can think that the line of the kite is the hypotenuse of a triangle rectangle, and the altitude is one of the cathetus of the triangle.

And we know that it makes an angle of 65° with the horizontal (i guess this is measured between the hypotenuse and the horizontal adjacent to the kite.

This angle is complementary to the top angle of our triangle rectangle, such that A + 65° = 90°

A = 90° - 65° = 25°

Then the altitude of the kite is the adjacent cathetus to this angle.

We can use the relation:

sin(A) = Adjacent cathetus/hypotenuse.

Sin(25°) = X/350ft

Sin(25°)*350ft = X = 147.9m

4 0
3 years ago
WORTH 30 POINTS!!!! HELP ASAP!!!!!<br><br> Find 121/2% of 720. Show work please.
DedPeter [7]
121/2 = 720/p
720*2= 121p
1440=121p
divide by 121 
=12% 
8 0
4 years ago
Find the solution to the system of equations below
djverab [1.8K]

Answer:

(4,7)

Step-by-step explanation:

7 0
3 years ago
Hurry 50 points for correct answer
Ad libitum [116K]

Answer: <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>

Step-by-step explanation:

The equation x=\sqrt{6x+7} can be solved by squaring both sides:

x^2 = 6x + 7\\\\x^2 - 6x - 7 = 0\\\\(x-7)(x+1) = 0

We can see that -1 and 7 are solutions, but make sure they are not extraneous by substituting them in the original equation:

1 = \sqrt{-1}\\ 7 = \sqrt{49}

The square root of 49 equals 7, but the square root of -1 is an imaginary number.

The correct choice is <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>

4 0
3 years ago
Convert 13 to fifths.<br> Write your answer as a fraction.
Zina [86]

Answer:

65/5

Step-by-step explanation:

You just need to multiply 13 by 5.

4 0
3 years ago
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