3 years ago

Glven: -7x < -21. Choose the solution set.

Mathematics

2 answers:

SVEN [57.7K]3 years ago

7 0

Answer:

x > 3

Step-by-step explanation:

-7x < -21

Divide each side by -7, remembering to flip the inequality

-7x/-7 > -21/-7

x > 3

Ivan3 years ago

6 0

Answer:

x > 3

Step-by-step explanation:

Get the variable (x) by itself. Divide both sides by -7. Since a negative/ negative = positive, the 3 is positive. When you multiply or divide by a negative, the inequality sign flips. I hope this helped.

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The temperature in Anchorage, Alaska at 6:00 am was 2°C. If the temperature drops 2 degrees each hour, what is the temperature i

Fittoniya [83]

Answer:

-12°C

Step-by-step explanation:

6AM = 2°C

8AM= -2°C

10AM= -6°C

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3 years ago

Suppose A is a matrix and k is a positive integer. What does the notation Ak mean?

Butoxors [25]

Answer:

Scalar product

Step-by-step explanation:

The scalar product of a matrix refers to the product of a matrix and a number. The scalar is used to multiply each element in the matrix to get the final vector. In the question the scalar is k which is a constant and the matrix is A.

in the example below 2 is the scalar

$2*\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]$