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3 years ago

PLEASE HELP LOTS OF POINTS!!!!!!!! TWO QUESTIONS!!!!!!!!!

Mathematics

1 answer:

zubka84 [21]3 years ago

6 0

Answer: Number one would be 3x+2y+-14 and x+y=-4, second one is x=-3, y=7

Step-by-step explanation:

The first one is solved by inputting the x and y in each one and finding which one comes out true, the second on is solved by substitution. to find x you would subtract x in the first equation and make it y=4-x then input that equation in the y in the second equation.

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The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 122 and standard deviation of 22

marin [14]

Answer: 4.27% of adults in the USA have stage 2 high blood pressure.

Step-by-step explanation:

Let x be a random variable that denotes a person with high blood pressure .

Given: Average blood pressure: $\mu=122$

Standard deviation: $\sigma=22$

Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.

The probability that an adult in the USA have stage 2 high blood pressure:

$P(x\geq160)=P(\dfrac{x-\mu}{\sigma}}\geq\dfrac{160-122}{22})\\\\=P(z\geq1.72)\ \ \ [z=\dfrac{x-\mu}{\sigma}]\\\\=1-P(z$

Hence, 4.27% of adults in the USA have stage 2 high blood pressure.

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2 years ago

What was the total amount of water in the tank before it was drained

OlgaM077 [116]

Answer:

c is the correct option

Step-by-step explanation:

please mark me as brainlist

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2 years ago

Read 2 more answers

Find and explain how to find D.

almond37 [142]

A = 80/2 = 40
b = 100/2 = 50

d = 180 - (a+b)
d = 180 - (40+50)
d = 180 - 90
d = 90

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3 years ago

Which expression is equal to (f+g)(x)? <br><br> f(x)=x²+3; g(x)=x-1

masha68 [24]

It would be the same equal. g(x)=x-1. hope this helps

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3 years ago

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Can you please help me with this? I don't get it

kirill115 [55]

<span>If you're trying to solve for x, then there is no solution. Since the left side is positive, the inequality has no solution over the domain.</span>

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2 years ago