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Serga [27]
4 years ago
9

Which system of equation is represented​

Mathematics
1 answer:
olga nikolaevna [1]4 years ago
4 0

Answer:

D

Step-by-step explanation:

First, let us figure out what is graphed and then manipulate each answer to try to match it.

The one with a positive slope is

y\leq x-2

The one with the negative slope is

y\geq 3-2x

Now that we have our graphed system of inequalities, we can try to match them to an answer.

A. while the x-2 is the same, the other does not have an x, so it cannot match.

B. The second inequality has the wrong sign, so it is impossible for this to be our answer.

C. When each of these are solved for y, you get y\leq 2x-3\\\\y\leq 2-x. Neither of these match so this cannot be correct.

D. When the first inequality is solved you get y\geq 3-2x

When the second inequality is solved you get y\leq x-2

As both of these answers match our graphed inequalities, D is the correct answer.

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The amount of Jen's monthly phone bill is normally distributed with a mean of $59 and a standard deviation of $10. What percenta
blsea [12.9K]

Answer:

P(29

And we can find this probability with this difference:

P(-3

And in order to find these probabilities using the normal standard distribution or excel and we got.  

P(-3

So we expect about 99.735% of values between $29 and $89

Step-by-step explanation:

Let X the random variable that represent the amount of Jens monthly phone of a population, and for this case we know the distribution for X is given by:

X \sim N(59,10)  

Where \mu=59 and \sigma=10

We are interested on this probability first in order to find a %

P(29

The z score is given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(29

And we can find this probability with this difference:

P(-3

And in order to find these probabilities using the normal standard distribution or excel and we got.  

P(-3

So we expect about 99.735% of values between $29 and $89

8 0
3 years ago
What is r + 3/4 = 7/8
Tom [10]

Answer:

r + ¾ = ⁷/₈

r = ⁷/₈ - ¾

⁷/₈ - ⁶₈ = ¹/₈

r = ¹/₈

Step-by-step explanation:

but my original answer was 4/4

7 0
3 years ago
Denote the set below by set-builder notation, using x as the variable.
Temka [501]

Answer:

C. {x|x is an odd natural number between 1 and 67}

Step-by-step explanation:

B and C is also correct if the natural number is defined to be started with 1: positive integer,

but if it's defined to be non-negative real number then only C

7 0
3 years ago
Solve 5(a – 7) 11 = 2a – 3(a 4)
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Rama09 [41]
4n= C should be your answer
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3 years ago
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