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3 years ago

What two numbers when added equal 25 and when multiplied = -200

1 answer:

3 0

The numbers are irrational, so I can't write them exactly with digits.
When rounded to the nearest ten-thousandth, they are

31.3746
and
-6.3746 .

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Please help, I've never gotten these and I still dont. this test is 95% of my grade

sweet-ann [11.9K]

Answer:

-10

-4

-13

Step-by-step explanation:

this is how to do it.

4 0

3 years ago

archy bought 15 gallons of gas for $23.85. Joe bought 16 gallons of gas for $24.48. who paid less per gallon?

tekilochka [14]

Archy: 15 gallons ... $23.85
1 gallon ...$ x = ?

x * 15 = 1 * 23.85 /15
x = 23.85 / 15
x = $1.59 per gallon

Joe: 16 gallons ... $24.48
1 gallon ... $ y = ?

y * 16 = 1 * 24.48 /16
y = 24.48 / 16
y = $1.53 per gallon

Result: Joe paid less per gallon.

3 0

3 years ago

Let A = −2 2 1 −3 1 1 2 0 −1 and B = 2 −1 0 1 2 1 −1 −2 4 . Use the matrix-column representation of the product to write each co

BigorU [14]

Answer:

AB = $\left[\begin{array}{ccc}-3&4&6\\-6&3&5\\5&0&-4\end{array}\right]$

Each column of AB is written as a linear combination of columns of Matrix A in the explanation below.

Step-by-step explanation:

A = $\left[\begin{array}{ccc}-2&2&1\\-3&1&1\\2&0&-1\end{array}\right]$

B= $\left[\begin{array}{ccc}2&-1&0\\1&2&1\\-1&-2&4\end{array}\right]$

We need to write each column of AB as a linear combination of the columns of A so we will multiply each column of A with each column element of B to get the column of AB. So,

AB Column 1 = 2 * $\left[\begin{array}{ccc}-2\\-3\\2\end{array}\right]$ + 1 $\left[\begin{array}{ccc}2\\1\\0\end{array}\right]$ + (-1) $\left[\begin{array}{ccc}1\\1\\-1\end{array}\right]$ = $\left[\begin{array}{ccc}-3\\-6\\5\end{array}\right]$

AB Column 2 = (-1) $\left[\begin{array}{ccc}-2\\-3\\2\end{array}\right]$ + 2 $\left[\begin{array}{ccc}2\\1\\0\end{array}\right]$ + (-2) $\left[\begin{array}{ccc}1\\1\\-1\end{array}\right]$ = $\left[\begin{array}{ccc}4\\3\\0\end{array}\right]$

AB Column 3 = (0) $\left[\begin{array}{ccc}-2\\-3\\2\end{array}\right]$ + (1) $\left[\begin{array}{ccc}2\\1\\0\end{array}\right]$ + 4 $\left[\begin{array}{ccc}1\\1\\-1\end{array}\right]$ = $\left[\begin{array}{ccc}6\\5\\-4\end{array}\right]$

Finally, we can combine all three columns of AB to form the 3x3 matrix AB.

AB = $\left[\begin{array}{ccc}-3&4&6\\-6&3&5\\5&0&-4\end{array}\right]$

4 0

4 years ago

The triangles in the figure are similar: ΔABC ∼ ΔDEF. Which of the following statements must be true? options: A) AB/DE=BC/EF=CA

VikaD [51]

Answer:

Answer A

Step-by-step explanation:

We see that ABC is similar to DEF. Pay attention to the order of these letters. The order that they read (left-to-right) is the order that they are similar. For example, AB is similar to DE. Despite being different triangles, they are both the <em>first two </em>letters in the triangle. So, knowing this, we can conclude that answer choice A is correct.

7 0

4 years ago

Read 2 more answers

Does point A on the graph represent a pair of possible values of m and w?

iris [78.8K]

Answer:

No, because 30 is not equal to 2.5 times 6

Step-by-step explanation:

2.5 times 6 = 15

4 0

3 years ago

Read 2 more answers