I don't understand anything Please help

Mathematics

2 answers:

pychu [463]3 years ago

5 0

4) -2x-3+3x≥12

ok so this symbol ≥ means greater than or equal too

So since that symbol is with the 12 that means
-2x-3+3x
Has to be greater than or equal to 12
So
For the x's you can substitute anything as long as its greater than or equal to 12

Like:
-2*-4-3+3*4

-2*-4 = 8

8-3+3*4

8-3=5

5+3*4

5+3=8

8*4=32 which is greater than 12 and what they're looking for is something greater than or equal to 12

andrezito [222]3 years ago

3 0

First, organize all of the like terms. All of the numbers to one side, all of the variables to the other. Then, divide to get x by itself.

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Two pitchers, Jerry and Louis, want to find out who has the faster pitch when compared to each of their teams. Jerry has a speed

saul85 [17]

Answer:

Louis has faster pitch when compared to each of their teams.

Step-by-step explanation:

We have two pitchers which we need to compare to each of their teams.

To calculate this, we will approximate the distributions to a normal distribution, and calculate the z-score, to know what proportion of players of their team fall below their score.

For Jerry, he has a speed of 86 and his team has a mean speed of 93 and standard deviation of 3.

We can calculate the z-score for Jerry speed as:

$z=\dfrac{X-\mu}{\sigma}=\dfrac{86-93}{3}=\dfrac{-7}{3}= -2.333$

The proportion of players that are below Jerry speed is approximated by the standard normal distribution:

$p=\Phi(z$

For Louis, his speed is 84 and his team has a mean speed of 89 and standard deviation of 3.5.

We can calculate the z-score for Jerry speed as:

$z=\dfrac{X-\mu}{\sigma}=\dfrac{84-89}{3.5}=\dfrac{-5}{3.5}= -1.429$

The proportion of players that are below Louis speed is approximated by the standard normal distribution:

$p=\Phi(z$

As the proportion of players of Louis team that are below Louis speed is much bigger than the proportion of players of Jerry's team that are below Jerry speed, we can say that Louis has faster pitch when compared to each of their teams.

6 0

3 years ago

PLEASE HELP ASAP GIVING BRAINLIEST

Lady_Fox [76]

Answer:

Part 1) $y=32.5x+11.95$