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3 years ago

Can someone help me with my exit ticket please !!!

Mathematics

1 answer:

skelet666 [1.2K]3 years ago

8 0

Step-by-step explanation:

1) highlight left top, left bottom, middle bottom and right top

2)(-3;-infty)

3)a

4) [-4;-infty)

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gregori [183]

It’s D bc Dt= 15x3 and it’s not that hard to solve

6 0

3 years ago

Rewrite the system of linear equations as a matrix equation AX = B.

iren2701 [21]

Answer:

$\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]*\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]=\left[\begin{array}{ccc}5\\6\\7\end{array}\right]$

Step-by-step explanation:

Let's find the answer.

Because we have 3 equations and 3 variables (x1, x2, x3) a 3x3 matrix (A) can be constructed by using their respectively coefficients.

Equations:

Eq. 1 : x1 + 2x2 + 5x3 = 5

Eq. 2 : x1 + x2 + x3 = 6

E1. 3 : 4x1 + 6x2 + 5x3 = 7

Coefficients for x1 ; x2 ; x3

From eq. 1 : 1 ; 2 ; 5

From eq. 2 : 1 ; 1 ; 1

From eq. 3 : 4 ; 6 ; 5

So matrix A is:

$\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]$

And the vector of vriables (X) is:

$\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]$

Now we can find the resulting vector (B) using the 'resulting values' from each equation:

$\left[\begin{array}{ccc}5\\6\\7\end{array}\right]$

In conclusion, AX=B is:

$\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]*\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]=\left[\begin{array}{ccc}5\\6\\7\end{array}\right]$

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3 years ago

A store manager receives a delivery of 2 boxes of light bulbs.Each box contains 25 lightbulbs.The store manager tests all the li

kolezko [41]

Answer:

Step-by-step explanation:

A delivery of 4 boxes will contain 2 more defective lightbulbs than a delivery of 2 boxes.

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3 years ago

Ron gets $5 on the first day at work, the square of that amount on the second day, and three times the amount of the second day

Ket [755]

Answer:

5 + 25 + 75 = 105 dollars

Step-by-step explanation:

The easiest way is to just take this day by day.

day 1: 5 dollars

day 2: day1^2 = 5^2 = 25

day 3: 3 * day2 = 3 * 25 = 75

Then sum them: 5 + 25 + 75

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3 years ago

The figures shown are similar. What is the scale factor? A.1/9 B.4/7 C.6/7 D.3/7

Rom4ik [11]

<span>B.4/7

You can check by taking 21 * 4/7 = 12 which is figure 2
</span>

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3 years ago