All categories

4 years ago

Help please I have no idea

Mathematics

1 answer:

Gennadij [26K]4 years ago

8 0

So before we solve the inequality, note that the sign is >, not ≥. This will mean that the line will be a dashed line, not a solid line. This will eliminate Options A & C.

So to solve the inequality, just minus 2 on both sides, and your inequality is gonna be: y > -3x - 5 .

Now that we solved the inequality, we must figure out which side is shaded. To do that, use any point that isn't on the line and solve the inequality using it. The easiest point is always (0,0) so I'll be using that point.

0 > -3(0) - 5

0 > 0 - 5

0 > -5 (true)

Since the inequality was true, that means that (0,0) is going to be in the shaded area. And the only graph that has a dashed line with (0,0) as the solution is Graph D, therefore that is your answer.

You might be interested in

write an expression using addition and/or multiplication to represent how much money eric has at week five if he started $200 in

Lorico [155]

You multiply 200 by 5 it's equal to 1,000

5 0

4 years ago

You ask an employee to string holiday lights around the perimeter of a circular room. The room is 30 feet in diameter. How many

Arturiano [62]

Answer: 94.24 feet.

Step-by-step explanation:

1. To solve this exercise you must apply the formula for calculate the perimeter of a circle, which is shown below:

$P=2r\pi$

Where $r$ is the radius of the circle.

2. You can calculate the radius of the circle by dividing the diameter by 2, as following:

$r=\frac{30ft}{2}\\r=15ft$

3. Substitute this value into the formula. Then, you obtain that the result is:

$P=(2)(15ft)(\pi)\\P=94.24ft$

3 0

3 years ago

John worked "x" hours this week and Shanique worked eight hours less than John. Write an algebraic expression for the number of

sergij07 [2.7K]

Answer:

X>8

Step-by-step explanation:

X>8

6 0

3 years ago

Heights of 10 year-olds, regardless of gender, closely follow a normal distribution with mean 55 inches and standard deviation 6

IRISSAK [1]

Answer:

A normal probability plot of heights of a random sample of 500 10 year- old people should show a fairly straight line

Step-by-step explanation:

We are given that heights are normally distributed with mean=55 and standard deviation=6.

Now explaining all the given statements.

Roughly 95% of 10 year-old are between 37 and 73 inches tall.

This statement is not true. We know that approximately 95% of data lies within interval mean±2*standard deviation (empirical rule).

mean±2*standard deviation=55±2*6=55±12=(43,67)

So, 95% of 10 year-old are between 47 and 67 inches tall. Thus, the above statement is wrong.

A 10 year-old who is 65 inches tall would be considered more unusual than a 10 year-old who is 45 inches tall.

If the heights of 10 years old lie more than 2 standard deviation away then it will considered as unusual and If the heights of 10 years old lie more than 3 standard deviation away then it will considered as more unusual.

As 65 and 475 lies within two standard deviation from mean, so these are not unusual data values. So, the above statement is not true.

A normal probability plot of heights of a random sample of 500 10 year- old people should show a fairly straight line.

A normal probability plot shows straight line when the data is normally distributed and we know that if the population is normally distributed then then sample selected from this population is also normally distributed with mean μxbar and standard deviation σxbar. So, this statement is true.

We would expect more 10 year-old to be shorter than 55 inches than taller than 55 inches

Last few words were missing from the statement and i gathered them through web search.

The probability of 10 years old shorter than 55 is 50% and probability of 10 years old taller than 55 as area under the normal curve is 1 and given mean is 55. The area above mean and below mean in the normal curve is 0.5. So, we can't say that We would expect more 10 year-old to be shorter than 55 inches than taller than 55 as they have equal probabilities. Thus, the above statement is not true.

8 0

4 years ago

Mr. Hynes buys a large variety bag of Hershey chocolates to give out for Valentine’s Day. The bag of chocolates costs $8.00 and

zmey [24]

Answer:

1.50

Step-by-step explanation:

4 0

3 years ago