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2 years ago

6) Write an expression that is equivalent to 3(7 + x). 3(7+ x) =_ +_ ?

Mathematics

1 answer:

sergejj [24]2 years ago

6 0

Answer:

21 + 3x

Step-by-step explanation:

hope this helps

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The work of a student to solve a set of equations is shown:

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Step 2! The reason for that is the student didnt multiplied (15-2z) with -2. But she should have!

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2 years ago

What is 73/50 as a percent

Rainbow [258]

73/50
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The answer would be 146%

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2 years ago

Solve for k J = k^2/4 (There can be multiple answers)

Makovka662 [10]

Answer:

The first option is the answer (k = +/- 2 square root of J)

Step-by-step explanation:

Since you need to leave k by itself, You multiply both sides by 4 which will leave you with 4J=k^2. To get rid of the square(^2), you need to square root both sides which will leave k by it self. So now you have 4J inside the square root = k. The last step is to take the square root of 4 (which is + or -2) and put it outside the square root sign, leaving J inside the square root.

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3 years ago

Csc (2sin^-1(-12/13)) that is 2 times inverse sin of -12/13

german

Answer: $-\frac{169}{120}$

I'm assuming you mean this:

$cosec(2sin^{-1}(\frac{-12}{13}))$

Recall what the cosecant function represents. It is the reciprocal of a sine function, and is often written in this form:

$\frac{1}{sinx}$

So, using the sine relationship:

$cosec(2sin^{-1}(\frac{-12}{13})) = \frac{1}{sin(2sin^{-1}(\frac{-12}{13}))}$

Let $u = sin^{-1}(\frac{-12}{13})$
$cosec(2sin^{-1}(\frac{-12}{13})) = \frac{1}{sin(2u)}$
$= \frac{1}{2sinu \cdot cosu}$
$= \frac{1}{2sin(sin^{-1}(\frac{-12}{13})) \cdot cos(sin^{-1}(\frac{-12}{13}))}$
$= \frac{1}{\frac{-24}{13} \cdot \sqrt{1 - (\frac{-12}{13})^{2}}}$
$= \frac{1}{\frac{-24}{13}} \cdot \frac{1}{\sqrt{1 - \frac{144}{169}}}$
$= -\frac{13}{24} \cdot \frac{1}{\sqrt{\frac{25}{169}}}$
$= -\frac{13}{24} \cdot \frac{1}{\frac{5}{13}}$
$= -\frac{13}{24} \cdot \frac{13}{5}$
$= -\frac{169}{120}$

3 0

2 years ago

Find the area of this rectangle. 5 in 10 in A = [?] in?

Talja [164]

Answer:

A=50

Step-by-step explanation:

5x10=50in

4 0

2 years ago

Read 2 more answers

6) Write an expression that is equivalent to 3(7 + x). 3(7+ x) =___ +___ ?

6) Write an expression that is equivalent to 3(7 + x). 3(7+ x) =_ +_ ?