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timurjin [86]
2 years ago
5

Which inequality represents all the solutions of 9(4x-8) < 4(6x + 9)?

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
4 0

Answer:

x < 9

Step-by-step explanation:

Our original inequality:

9(4x-8) < 4(6x+9)

Firstly, let's expand the brackets on both sides:

36x - 72 < 24x + 36

Now, we add the 72 over to isolate the x:

36x < 24x + 108

Next, we take away the 24x to isolate the x:

12x < 108

Finally, we divide both sides by 12 to convert the 12x to x:

x < 9

This means our final answer is x < 9.

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A recommendation for wheelchair ramps is that the rise-to-run ratio be no greater than 1:12. This ensures that the ramps are nav
patriot [66]

Answer:

a. 12 feet b. 12 feet 0.5 inches c. 8.33 %

Step-by-step explanation:

a. How far out horizontally on the ground will it protrude from the building?

Since the rise to run ratio is 1:12 and the building is 12 inches off the ground, let x be the horizontal distance the ramp protrudes.

So, by ratios rise/run = 1/12 = 12/x

1/12 = 12/x

x = 12 × 12

x = 144 inches

Since 12 inches = 1 foot, 144 inches = 144 × 1 inch = 144 × 1 foot/12 inches = 12 feet

b. How long should the ramp be?

The length of the ramp, L is gotten from Pythagoras' theorem since the ramp is a right-angled triangle with sides 12 inches and 144 inches respectively.

So, L = √(12² + 144²)

= √[12² + (12² × 12²)]

= 12√(1 + 144)

= 12√145

= 12 × 12.042

= 144.5 inches

Since 12 inches = 1 foot, 144.5 inches = 144 × 1 inch + 0.5 inches = 144 × 1 foot/12 inches + 0.5 inches = 12 feet 0.5 inches

c. What percent grade is the ramp?

The percentage grade of the ramp = rise/run × 100 %

= 12 inches/144 inches × 100 %

= 1/12 × 100 %

= 0.0833 × 100 %

= 8.33 %

6 0
2 years ago
Question 5- Please help. Using a piece of pizza explain what arc length and area of the sector mean in two to three sentences.
pickupchik [31]

Answer:

You'd have to look at the size of the pizza and then measure the size of the arc for each slice. The slice of pizza is how many topping is on it. The sector is how much pizza you are consuming from the center to the crust. The arc is the crust around the pizza.

3 0
3 years ago
N.6 Properties of parallelograms
PolarNik [594]

Answer:

J=63

Step-by-step explanation:

3b+27=2b+57

subtract 27 from both sides

3b=2b+30

subtract 2b from both sides

b=30

K+J=180

substitute the value of b into K

2(30)+57+J=180

117+J=180

subtract 117 from both sides

J=63

4 0
2 years ago
A pipe is leaking at 1.5 cups per day. about how many gallons per week is the pipe leaking
Alenkinab [10]
Remember that there are 16 cups in a gallon.

The pipe leaks 1.5 cups each day, so in one week, or 7 days, the cup leaks 1.5 times 7 cups, which equates to 10.5 cups per week.
To find this number in gallons, divide 10.5 by 16.
This equals .65625 gallons per week.
Hope this helps! 
~Chrys
8 0
3 years ago
Which of the following is the correct expanded form for the series below?
mixer [17]

Answer:

A.

Step-by-step explanation:

four terms are needed. 1-4

so that eliminates bottom 2 choices

7 0
3 years ago
Read 2 more answers
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