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Sauron [17]
3 years ago
7

Which of the following would you add to each side of the equation x-9=12 to get the variable by itself?

Mathematics
1 answer:
VLD [36.1K]3 years ago
6 0
X-9=12
x-9+9=12+9
You need to add 9 to each side of the equation.
x=21
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Please Help! Brainliest Answer! Thank you
GrogVix [38]

Answer:

<h2>B.  27.73 ft.</h2><h2 />

Step-by-step explanation:

see attached image.

the distance between the two person standing on opposite

of a rectangular courtyard is by using Pythagorean theorem:

x² = 25² + 12²

x = \sqrt{625 + 144}

x = 27.73 ft.

4 0
3 years ago
Karen's fish tank has 13 liters of water in it. She plans to add 4 liters per minute until the tank has at least 57 liters. What
guapka [62]

Answer:

Karen has to at least spend 11 minutes.

Step-by-step explanation:

This is because 57 - 13 = 44. 44 divided by 4 = 11. This means that in 11 minutes Karen will have a 57 liter tank. But she could keep going, but the least number of minutes would be 11 minutes, to get to 57 liters.

I hope this helps! Please mark me Brainliest if it did! Thank you and have a nice day!

4 0
3 years ago
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A medical records clerk gathers data about patients with broken bones. It is found that 3/5 of the medical records are for broke
beks73 [17]
3/5 = x/1357
Cross multiple
5x = 4071
Divide by 5
X = 814 records of broken bone
4 0
3 years ago
What is the product 1/4 times 3 ? Use the visual model to answer the question?
satela [25.4K]

multiply 1/4 times 3 equal 3/4 or 0

5 0
2 years ago
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Please helpppppppppppp
morpeh [17]

Answer:

7.7 km

Explanation:

Use cosine rule as here given two sides and one angle.

Cosine rule states:

a² = b² + c² - 2bc cos(A)

While solving, treat a = 7.5 km as to that opposite angle is given of 68°

then b = missing side, c = 5.2 km, A = 68°

Applying rule:

7.5² = b² + 5.2² - 2(b)(5.2) cos(68)

56.25 = b² + 27.04 - 3.8959b

56.25 - 27.04 = b² - 3.8959b

b² - 3.8959b = 29.21

b² - 3.8959b - 29.21 = 0

apply quadratic equation, Here [a = 1, b = - 3.8959, c = -29.21]

\sf b = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \quad\:when \:\ ax^2 + bx + c = 0

\sf b = \dfrac{ -(-3.8959) \pm \sqrt{(-3.8959)^2 - 4(1)(-29.21)}}{2(1)}

\sf b = 7.69 291 \quad or \quad b = -3.797

\sf b = 7.7 \quad (rounded \ to \ nearest \ tenth)

As length cannot be negative. Hence the value of b is only 7.7 km

7 0
2 years ago
Read 2 more answers
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