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4 years ago

9. Solve x - 72 > 21.

2 answers:

7 0

Inequalities are just like regular equations with only one exception. Which is when yo multiply or divide by a negative number to both sides of the inequality sign you must flip it. But, for this inequality that rule will no apply. So, what I do to make it easier because I know we all see a different sign in an equation and we start to freak out. So, change the inequality sign to an equals sign to get a hang of working with them.

Example of changing an inequality sign to an equals sign:

$x-72=21$

$x-72+72=21+72$ Addition property of equality

$x=93$

Example of keeping the inequality sign

$x-72>21$

$x-72+72>21+72$ Addition property of equality

$x>93$

Andrej [43]4 years ago

6 0

Answer:

x> 93

Step-by-step explanation:

x - 72 > 21.

Add 72 to each side

x - 72+72 > 21.+72

x> 93

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konstantin123 [22]

12,500 divide 1999, 12,500 divide 1998, etc hope this helps

5 0

3 years ago

Read 2 more answers

the uniform distribution over the interval 8.5 to 11.5 gallons per minute. Find the probability that between 9.0 gallons and 10.

Tema [17]

Answer: 1/3

Step-by-step explanation:

Here is the complete question:

machine is set to pump cleanser into a process at the rate of 9 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 8.5 to 11.5 gallons per minute. Find the probability that between 9.0 gallons and 10.0 gallons are pumped during a randomly selected minute.

The Probability of the above question will be calculated as:

= (10-9) / (11.5 - 8.5)

= 1/3

The above is the easier way to solve this

3 0

3 years ago

Someone plzz help me understand this i am so confused

ad-work [718]

Answer:

XA = 9

AY = 9

XY = 18

Step-by-step explanation:

hope this helps!!

4 0

3 years ago

4.8.4 Raw materials are studied for contamination. Suppose that the number of particles of contamination per pound of material i

forsale [732]

Answer:

700 lbs and 3.742

Step-by-step explanation:

Given that raw materials are studied for contamination. Suppose that the number of particles of contamination per pound of material is a Poisson random variable with a mean of 0.02 particle per pound.

a) To get 14 particles of contamination we must have

expected number of pounds = $\frac{14}{0.02} \\=700$

b) Since for 700 pounds particles expected are 14 we can say in a Poisson distribution mean and variance are equal

i.e. Var (700 lbs to obtain 14 particles of contamination ) = 14

Std deviation = $\sqrt{14} =3.742$

5 0

3 years ago

Use two unit multipliers to convert 628 kilometers to centimeters

irina [24]

Using two unit multiplier 628 km is equal to 62800000 cm

<u>Solution:</u>

628 kilometer to centimeter

We will go from kilometers to meters to centimeters.

Start by putting 628 km over 1:

$\frac{628 km}{1}$

We want to get rid of km and bring in m.

We know that 1000 m = 1 km.

Since km is in the numerator, we will make the first unit multiplier by putting 1 km in the denominator and 1000 m in the numerator, so the km will cancel. So we multiply by the unit multiplier,

$\frac{628 km}{1} \times \frac{1000m}{1km}$

Now the km's will cancel:

$\frac{628}{1} \times \frac{1000m}{1}$

Now we want to get rid of m and bring in cm.

We know that 100 cm = 1 m.

Since meter is in the numerator, we will make the first unit multiplier by putting 1 meter in the denominator and 100 cm in the numerator, so the meter's will cancel. So we multiply by the unit multiplier

$\frac{100cm}{1m}$

$\frac{628}{1} \times \frac{1000m}{1} \times \frac{100cm}{1m}$

We cancel the m's and we end up with:

$628 \times 1000 \times 100 cm$

= 62800000 cm

Thus 628 km is equal to 62800000 cm

5 0

4 years ago