-5x-4=? a.1 b.-1 c.20 d.-20

Answers

Answer 1

Answer: -5x -4 = 0 Add both sides by 4
-5x = 4 Divide both sides by -5
x = -4/5

... That is the answer I got for x...

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How are rate of change and slope different?

Answers

Answer:

The vertical change between two points is called the rise, and the horizontal change is called the run. The slope equals the rise divided by the run: . ... If coordinates of any two points of a line are given, then the rate of change is the ratio of the change in the y-coordinates to the change in the x-coordinates.

Step-by-step explanation:

The variables x and y are directly proportional, and y=2 when x=3. What is the value of y when x=9

Answers

$If\ x\ and\ y\ are\ directly\ proportional\ then\ (y)/(x)\ is\ constans\n---------------------------\n\n(2)/(3)=(y)/(9)\n\ncross\ multiply\n\n3y=2*9\n\n3y=18\ \ \ \ |divide\ both\ sides\ by\ 3\n\ny=6$

you cross multiply and you should get i think 6?

Which expression is equivalent to (8-3i)-(2-91)?Ο Α. 18-6i
OB. 11 +78
O C. 6-12i
O D. 6+6i

Answers

Answer:

the correct answer is option B.

Step-by-step explanation:

First, we need to combine the terms inside the parentheses.

This gives us (8-3i)-(2-9i), or (8-3i)-(-2+9i).

We can then use the additive inverse property to simplify this to (8-3i)+2+9i, which is equal to (11+6i). Therefore, the correct answer is option B.

A submarine descends 45 meters on its first dive. It then descends another 40 meters. What integer represents the total descent in meters for the two dives?