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kotegsom [21]
3 years ago
14

What is the best way to study for the teas test

Mathematics
2 answers:
Natasha_Volkova [10]3 years ago
8 0
Use your notes from that unit or previous years if you've done it before 
Blizzard [7]3 years ago
7 0
Use your notes, and study !
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solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations. x-2y+
Alekssandra [29.7K]

Answer:

x = -5, y = -6, z = -3

Step-by-step explanation:

Given the system of three equations:

\left\{\begin{array}{l}x-2y+3z=-2\\6x+2y+2z=-48\\x+4y+3z=-38\end{array}\right.

Write the augmented matrix for the system of equations

\left(\begin{array}{ccccc}1&-2&3&|&-2\\6&2&2&|&-48\\1&4&3&|&-38\end{array}\right)

Find the reduced row-echelon form of the augmented matrix for the system of equations:

\left(\begin{array}{ccccc}1&-2&3&|&-2\\6&2&2&|&-48\\1&4&3&|&-38\end{array}\right)\sim \left(\begin{array}{ccccc}1&-2&3&|&-2\\0&-14&16&|&36\\0&-6&0&|&36\end{array}\right)\sim \left(\begin{array}{ccccc}1&3&-2&|&-2\\0&16&-14&|&36\\0&0&-6&|&36\end{array}\right)

Thus, the system of three equations is

\left\{\begin{array}{r}x+3z-2y=-2\\16z-14y=36\\-6y=36\end{array}\right.

From the last equation:

y=-6

Substitute it into the second equation:

16z-14\cdot (-6)=36\\ \\16z=36-84\\ \\16z=-48\\ \\z=-3

Substitute y = -6 and z = -3 into the first equation:

x+3\cdot (-3)-2\cdot (-6)=-2\\ \\x=-2+9-12\\ \\x=-5

7 0
3 years ago
The graph of the function f(x) = x2 + 8x + 12 is shown. Which statements describe the graph? Check all that apply.
strojnjashka [21]
<span>The axis of symmetry is x = –4.
</span><span>The domain is all real numbers.
</span><span>The x-intercepts are at (–6, 0) and (–2, 0). </span>
7 0
3 years ago
Read 2 more answers
Rename the number 600,000 in ten thousands
telo118 [61]
I think it is 60,000
4 0
3 years ago
You buy a game for $40, and the sales tax is $2. What percent of the game price are you paying in sales tax? Your doctor told yo
AfilCa [17]

Answer:

a) 5%

b) 24%

Step-by-step explanation:

a) You buy a game for $40, and the sales tax is $2. What percent of the game price are you paying in sales tax?

Percentage you are paying in sales tax

= Sales tax / Sale price of the game × 100

= $2/$40 × 100

= 5%

b) Your doctor told you to eat 25 grams of fiber each day. You had 6 grams of fiber for breakfast. What percent of the 25 grams of fiber have you eaten so far?

The percent of 25 grams of fiber you have eaten so far =

6 grams/25 grams × 100

= 24%

3 0
2 years ago
What's 75% off of 4.97
Alenkasestr [34]
That would be 1.2425
7 0
3 years ago
Read 2 more answers
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