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3 years ago

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tell how to get the variable to be on one side of the equation by itself. 6n=72. 6=1.2a. 21/2x = 15 please explain

2 answers:

Vikki [24]3 years ago

7 0

#1 divide by 6n to both sides to get n by itself

#2 multiply both sides by 6/5a to get a by itself

#3 multiply both sides by 2/5x to get x by itself

When you have whole numbers (no decimals) you can divide. When you have numbers with decimals, convert them to fractions and multiply by the reciprocal to get the variable by itself.

skelet666 [1.2K]3 years ago

7 0

1.) you have to divide 6 on both sides to get the n by itself and it'll equal n=12.
2.) divide 1.2 on both sides and you'll get a=5
3.) divide 2.5 on both side and you'll get x=6

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Can someone please help me with these 2 problems? I’m confused

saveliy_v [14]

Answer:

7) $\dfrac{25c^2}{d^4}$

8) $4w^6r$

Step-by-step explanation:

You must use the laws of exponents.

7)

$(\dfrac{5c}{d^2})^2 =$

When you raise a fraction to an exponent, raise the numerator and the denominator to that exponent.

$= \dfrac{(5c)^2}{(d^2)^2}$

When you raise a product to an exponent, raise each factor to that exponent.

When you raise an exponent to an exponent, multiply the exponents.

$= \dfrac{5^2c^2}{d^4}$

$= \dfrac{25c^2}{d^4}$

8)

$\dfrac{-16w^7r^2}{-4wr} =$

To divide powers with the same base, subtract the exponents. Remember that a plain variable, such as w is the same as w^1.

$=\dfrac{-16}{-4}w^{7-1}r^{2-1}$

$= 4w^6r$

8 0

3 years ago

I dont know, i just did this for reason

mihalych1998 [28]

Hello, how is your day? :)

7 0

3 years ago

5. Solve the following triangle for all missing sides and angles.

Ipatiy [6.2K]

Answer:

Part I : 100°

Part II : a = 29.2

Part III : b = 20.95

Step-by-step explanation:

See the attached diagram of the triangle.

Part I: ∠ A = 180° - ∠ B - ∠ C = 180° - 45° - 35° = 100°

Part II: Now, applying the law of sines, we have

$\frac{AB}{\sin 35^\circ} = \frac{BC}{\sin 100^\circ}$

⇒ $\frac{17}{\sin 35^\circ} = \frac{a}{\sin 100^\circ}$

⇒ $a = \frac{17}{\sin 35^\circ} \times \sin 100^\circ$

⇒ a = 29.2 (Answer)

Part III: Now, applying law of cosine, we have

b = a cos 35° + c cos 100° = 29.2 cos 35° + 17 cos 100° = 20.95 (Answer)

4 0

3 years ago

Read 2 more answers

A bag contains 6 one-dollar coins and 4 two-dollar coins. Three coins are taken at random without replacement.

IgorLugansk [536]

The answer is b why because I had did it on the test and I had got it right HOPEFULLY IT HELPS

3 0

3 years ago

The classroom rug is 9 feet long and has an area of 72 square feet. What is the perimeter of the rug?

Novay_Z [31]

Answer:

<h3><u>34 Ft.²</u></h3>

Explanation:

Area = width · length

<em>The length of the rug is 9 feet. We need to find the width.</em>

72 ÷ 9 = 8

<em>Check to see if this is correct: width (8) · length (9) = area (72)</em>

<em>Now add the length and width together two times since a rug has 4 sides</em>

8 + 8 + 9 + 9 = 34

The perimeter of the rug is 34 ft.²

8 0

3 years ago