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3 years ago

Someone, please help me with this. Correct answers get brainiest

Mathematics

2 answers:

Phantasy [73]3 years ago

7 0

Answer:

-3

sqrt(9)

-sqrt(9)

Step-by-step explanation:

What number multiplied by itself will give you 9

3*3 =9

-3*-3 =9

sqrt(9) * sqrt(9) = sqrt(81) = 9

-sqrt(9) * -sqrt(9) = + sqrt(81) =9

bekas [8.4K]3 years ago

7 0

Answer:

$3$

$- 3$

$\sqrt 9$

$- \sqrt 9$

Step-by-step explanation:

${x}^{2} = 9 \\ \\ x = \pm \sqrt{9}\\ \\ x = - \sqrt{9}, \:x = \sqrt{9}\\ \\ x = - {3} \: \: x = {3}$

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5) Lee's model airplane flies at 18 miles per hour. Lee took the plane to a field in windy weather. It took six minutes to fly 2

kap26 [50]

The wind is blowing at the rate of 4 miles per hour

<h3>Speed and distances</h3>

The formula for calculating speed is expressed as:

Speed = Distance/Time

Given the following parameters

Speed of airplane = 18 miles per hour

Speed in wind = 2.2 * 10 = 22 miles/hr

Speed of the wind = 22 - 18

Speed of the wind = 4mi/hr

Hence the wind is blowing at the rate of 4 miles per hour

Learn more on speed here: brainly.com/question/4931057

7 0

2 years ago

A silversmith combined pure silver that cost $33.48 per ounce with 51 oz of a silver alloy that cost $24.35 per ounce. How many

Pavlova-9 [17]

Answer:

$38.31

Step-by-step explanation:

Given:

Pure silver that cost $33.48 per ounce used to form $24.35 alloy/ounce.

Question asked:

How many ounces of pure silver were used to make an alloy of silver costing $27.87 per ounce?

Solution:

At cost $24.35/ounce, pure silver is mixed = $33.48

At cost $1/ounce, pure silver is mixed = $\frac{33.48}{24.35}$

At cost $27.87/ounce, pure silver is mixed = $\frac{33.48}{24.35}$ $\times 27.87 = \frac{933.08}{24.35} = 38.31$

Thus, $38.31 ounces of pure silver were used to make an alloy of silver costing $27.87 per ounce.

5 0

3 years ago

A robin perched in a tree 40 feet above sea level. Directly below the robin, a seagull is flying 13 feet above sea level. Direct

katrin [286]

Answer:

See explanation

Step-by-step explanation:

The question is incomplete. However, I'll solve on a general terms.

Since the robin, seagull and fish are on directly below one another; a possible question could be to calculate the distance between the robin and the clownfish

The given parameters are:

$Robin = +40ft$

$Seagull= +13ft$

$Clownfish= -33ft$

+ represents above sea level while i represents below

The distance is then calculated as:

$Distance = Robin - Clownfish$

$Distance = +40ft - (-33ft)$

$Distance = +40ft +33ft$

$Distance = 73\ ft$

7 0

3 years ago

ms. rivera has 4,386 pencils. if 2,498 are already broken how many pencils does ms. rivera still have to write with?

Artemon [7]

Answer:

1,888 pencils

Step-by-step explanation:

6 0

3 years ago

1.02 X 10^2<br>8.54 X 10^-3<br>6.83 x 10^-4<br>9.12 X 10^-6

defon

Answer:

Step-by-step explanation:

1.02 X 10^2=102

8.54 X 10^-3=00.854

6.83 x 10^-4=0.000683

9.12 X 10^-6=00000.0912

3 0

3 years ago