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3 years ago

10

Ms. O'Conner took a poll of 80 students to find out how they get to school. How many more students get to school on a bus than i

n a car?

1 answer:

il63 [147K]3 years ago

4 0

Answer:

I need the dull question

Step-by-step explanation:

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The base of a triangle is 12 meters and the height is 6 meters. What is the area of the triangle?

-BARSIC- [3]

Answer:

36

Step-by-step explanation:

4 0

2 years ago

Solve the system of equations by transforming a matrix representing the system of equation into reduced row echelon form.

Gekata [30.6K]

Take the augmented matrix,

$\left[\begin{array}{ccc|c}2&1&-3&-20\\1&2&1&-3\\1&-1&5&19\end{array}\right]$

Swap the row 1 and row 2:

$\left[\begin{array}{ccc|c}1&2&1&-3\\2&1&-3&-20\\1&-1&5&19\end{array}\right]$

Add -2(row 1) to row 2, and -1(row 1) to row 3:

$\left[\begin{array}{ccc|c}1&2&1&-3\\0&-3&-5&-14\\0&-3&4&22\end{array}\right]$

Add -1(row 2) to row 3:

$\left[\begin{array}{ccc|c}1&2&1&-3\\0&-3&-5&-14\\0&0&9&36\end{array}\right]$

Multiply through row 3 by 1/9:

$\left[\begin{array}{ccc|c}1&2&1&-3\\0&-3&-5&-14\\0&0&1&4\end{array}\right]$

Add 5(row 3) to row 2:

$\left[\begin{array}{ccc|c}1&2&1&-3\\0&-3&0&6\\0&0&1&4\end{array}\right]$

Multiply through row 2 by -1/3:

$\left[\begin{array}{ccc|c}1&2&1&-3\\0&1&0&-2\\0&0&1&4\end{array}\right]$

Add -2(row 2) and -1(row 3) to row 1:

$\left[\begin{array}{ccc|c}1&0&0&-3\\0&1&0&-2\\0&0&1&4\end{array}\right]$

So we have $\boxed{x=-3,y=-2,z=4}$ .

3 0

3 years ago

Henry steps onto an elevator at the first floor. He goes up to the 9th floor and then comes down 2 floors. He then goes up 4 flo

dimaraw [331]

Answer:

D

Step-by-step explanation:

8 0

2 years ago

(2/5x) + 3 + (1/5x -1)

Ket [755]

Answer:

The answer is 15x+3 i think........... or its 10x+3/5x

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Devon has $900 in a savings account. The interest rate is 7% per year and is not

erastovalidia [21]

Answer:

$ 12600

Step-by-step explanation:

According to the question, you have to find the simple interest that Devon earn after 2 years,

You can use this formula to find that.

<h2>I = P r t</h2>

Here,

P = principal ( $ 900)

r = rate ( 7%)

t = time ( 2 years)

Let us solve now.

I = p × r × t

= $ 900 × 7% × 2 years

= 6300 × 2

= $ 12600

Hope this helps you.

Let me know if you have any other questions :-)

8 0

2 years ago