3 years ago

Describe and correct the error in solving the inequality 9x > -45

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

3 0

9x > -45
__ __
9 9

x > -5-----> ANSWER

if :
-9x > -45
___ ___
-9 -9

x < 5

You might be interested in

Bob had 2 apples Sam took 1 how many is left

Brilliant_brown [7]

1 apple is left..
2-1=1

5 0

3 years ago

Rachel hikes at a steady rate from a ranger station to a campground that is 20 mi away. After 2 h, she is 13 mi from the campgro

Angelina_Jolie [31]

Answer:

-3.5

The distance Rachel covers per hour is 3.5 miles

Step-by-step explanation:

After 2 hours, she is 13 miles from the campground.

After 4 hours, she is 6 miles from the campground.

Let x be the number of hours, y be the number of miles from the campground, then we have two points (2,13) and (4,6).

The equation of the line passing through the points $(x_1,y_1)$ and $(x_2,y_2)$ is

$y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)$

Substitute:

$x_1=2\\ \\y_1=13\\ \\x_2=4\\ \\y_2=6$

Hence,

$y-13=\dfrac{6-13}{4-2}(x-2)\\ \\y-13=-3.5(x-2)\\ \\y=-3.5x+7+13\\ \\y=-3.5x+20$

The slope of the line is $-3.5$ and it represents that the distance Rachel covers per hour is 3.5 miles.

8 0

3 years ago

A hoody that costs $18.00<br> was discounted at 40% off.

Lunna [17]

Answer:

$10.80

10% = 1.80

1.8x4 = 7.2

4 0

3 years ago

Leonard used 2/7 of his pay check to pay his cell phone bill and put 1/3 of his paycheck in savings

Nata [24]

There is no question here.

4 0

3 years ago

Due to environmental considerations, homeowners in a particularly dry area have been asked to use less water than usual. One hom

Dmitriy789 [7]

Answer:

good

those desert people ought to use less water

3 0

3 years ago