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Sidana [21]
3 years ago
8

You do not need to flip the inequality sign when solving the following -5 ≤ 4r + 3.

Mathematics
2 answers:
Deffense [45]3 years ago
7 0
Yes.

For inequality equation, you only flip the sign when you divide a negative number into both sides, here you will divide 4 on each side, so you won't flip the sign.
-Dominant- [34]3 years ago
7 0

the answer is true







do i get a prize?

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In triangle rst, rs=x+7, rt=2x-3, and st=x+7. If the perimeter is 32, find the value of x and classify the triangle by its sides
lana66690 [7]

Answer:

x = 5.25 and it is an isosceles triangle.

Step-by-step explanation:

The perimeter of a figure it the measure of all its sides added up.

Therefore RS+RT+ST=32

By substitution:

(x+7)+(2x-3)+(x+7)=32

Combine like terms and add:

4x+11=32

Subtract 11

4x=21

Divide 4

x=5.25

After substituting the value back in, we get that RS=12.25, RT=7.5, and ST=12.25

In an isosceles triangle, two sides have the same measure.

x = 5.25 and it is an isosceles triangle.

5 0
3 years ago
Read 2 more answers
Judy’s measured potassium level varies according to the Normal distribution with μ = 3.8 and σ = 0.2 mmol/l. Let us consider wha
Basile [38]

Answer:

The blood potassium level L such that the probability is only 0.05 that the average of four measurements is less than L is 3.64.

Step-by-step explanation:

To solve this question, we have to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means of size n can be approximated to a normal distribution with mean \mu and standard deviation, which is also called standard error s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 3.8, \sigma = 0.2, n = 4, s = \frac{0.2}{\sqrt{4}} = 0.1

What is the blood potassium level L such that the probability is only 0.05 that the average of four measurements is less than L?

This is the value of X when Z has a pvalue of 0.05. So it is X when Z = -1.645.

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

-1.645 = \frac{X - 3.8}{0.1}

X - 3.8 = -1.645*0.1

X = 3.64

The blood potassium level L such that the probability is only 0.05 that the average of four measurements is less than L is 3.64.

8 0
3 years ago
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A company decides to do a survey of overall employee happiness at each of its plants by choosing 100 employees to take the surve
Lilit [14]

Answer:

d

Step-by-step explanation:

4 0
3 years ago
N is an interger write down the values of n such that -8<4n<12
shepuryov [24]
I hope this helps you



-8÷4 <4n÷4 <12÷4




-2 <n <3



n= -1,0,1,2
4 0
3 years ago
Read 2 more answers
Find the circumference of the figure below.<br> (Use T=22/7)
vekshin1

The circumference of a circle with a radius of 12 cm is 75.45 cm

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

The circumference of a circle is given by:

Circumference = 2π * radius

Hence:

Circumference = 2(22/7)(12) = 75.45 cm

The circumference of a circle with a radius of 12 cm is 75.45 cm

Find out more on equation at: brainly.com/question/2972832

#SPJ1

8 0
2 years ago
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