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inn [45]
3 years ago
13

Plz, Help me with this question!

Mathematics
1 answer:
guapka [62]3 years ago
6 0

Answer:

G. 12

Step-by-step explanation:

Rachel = x

Trina = y

x = 2y - 6

x = (2x9) - 6

x = 18 - 6

x = 12

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Ximena is typing 2,500 word essay <br> at this rate can she type the essay in an hour
horrorfan [7]

Answer:

no

Step-by-step explanation:

3 0
3 years ago
Using Cramer's Rule, what is the value of x in the system of linear equations below?
Luden [163]

Answer:

0

Step-by-step explanation:

We find the determinant of a matrix by the method below. If we have a matrix:

\left[\begin{array}{cc}a&b\\c&d\end{array}\right]

The determinant is ad-bc

Now, using cramer's rule, we find x-value by the formula:

x=\frac{D_x}{D}

Where D is the determinant of the original problem and D_x is the determinant of the x-value matrix. How do we get those?

<u><em>To get original matrix and thus D, we set up the matrix as the coefficients of x and y (s) of both the equations and to get matrix of x-value and thus D_x, we replace the x values of the matrix with the numbers in the right hand side of the 2 equations.</em></u> We show this below:

<em />

<em>To get D:</em>

\left[\begin{array}{cc}3&4\\1&-6\end{array}\right] \\D=(3)(-6)-(1)(4)=-18-4=-22

<em>To get D_x:</em>

<em>\left[\begin{array}{cc}12&4\\-18&-6\end{array}\right] \\D_x=(12)(-6)-(-18)(4)=0</em>

<em />

<em>Putting into the formula, we get:</em>

<em>x=\frac{D_x}{D}=\frac{0}{-22}=0</em>

<em />

<em>Thus, the value of x is 0</em>

5 0
3 years ago
Which has a value of 32? A 25 B 32 C 48 D 84<br> a
Butoxors [25]

Answer:

B. 32

Step-by-step explanation:

32=32

3 0
3 years ago
How can i to write 914 as a decimal rounded to the nearest hundredth.
stealth61 [152]
914.0 or if it is a decmal 9.1
8 0
3 years ago
A sports shop buys tents for $260 less 25% for buying more than 30 tents. The store operates on a markup of 30% of the sale pric
ohaa [14]

Answer: $253.50

Step-by-step explanation:

Markup = 30% of sale price

Store purchase price = (100% - 25%) × 260

Store purchase price = 75% × 260

Store purchase price = 0.75 × 260

Store purchase price = $195

Regular selling price = markup × purchase price

Markup = 30% of purchase price (100+30)%

Regular selling price :

1.30 × $195 = $253.50

7 0
2 years ago
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