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2 years ago

How do I solve this question? What number is 5% of 860?

Mathematics

1 answer:

Serggg [28]2 years ago

3 0

Answer:

Step-by-step explanation:

You would take 5% as a decimal (0.05) and multiply 860 by the decimal.

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n a group of 40 people, 10 people are healthy. The 30 unhealthy people have either high blood pressure, high cholesterol, or bot

aalyn [17]

Answer:

If a person is randomly selected from this group, the probability that they have both high blood pressure and high cholesterol is P=0.25.

Step-by-step explanation:

We can calculate the number of people from the sample that has both high blood pressure (HBP) and high cholesterol (HC) using this identity:

$N(\text{HBP or HC})=N(\text{HBP})+N(\text{HC})-N(\text{HBP and HC})\\\\\\ N(\text{HBP and HC})=N(\text{HBP})+N(\text{HC})-N(\text{HBP or HC})\\\\\\ N(\text{HBP and HC})=15+25-30=10$

We can calculate the probability that a random person has both high blood pressure and high cholesterol as:

$P(\text{HBP and HC})=\dfrac{10}{40}=0.25$

3 0

2 years ago

Solve the system of equations by substitution.<br> 3/8x + 1/3y = 17/24<br> x + 7y = 8

bixtya [17]

Using the second equation, let’s find x

x + 7y = 8
x = 8 - 7y

Substitute x in the other equation

3/8(8 - 7y) + 1/3y = 17/24
3 - 21/8y + 1/3y = 17/24
-55/24y = -55/24
y = 1

Plug in y in any equation

x + 7(1) = 8
x + 7 = 8
x = 1

x = 1 and y = 1

3 0

2 years ago

<img src="https://tex.z-dn.net/?f=4%28a%20%2B%202%20%29%20-%202%20%28a%20-%203%29" id="TexFormula1" title="4(a + 2 ) - 2 (a - 3)

satela [25.4K]

Answer:

$\large\boxed{2a+14}$

Step-by-step explanation:

$4(a + 2 ) - 2 (a - 3)\qquad\text{use distributive property:}\ a(b+c)=ab+ac\\\\=4a+8-2a-(-6)\qquad\text{combine like terms}\\\\=(4a-2a)+(8+6)\\\\=2a+14$

5 0

2 years ago

Plz help! It's another probability question! Whoever answers correctly gets marked as brainliest!

Gelneren [198K]

Answer:

this is what I found:

Step-by-step explanation:

mark brainliest please :)

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3 years ago

What is the expression for the area of this rectangle?

raketka [301]

Answer:

Step-by-step explanation:

mcccccccccccccccccccccccccccccccccccccccccccccc

5 0

3 years ago