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alexandr1967 [171]
2 years ago
11

A dentist wants to find out how often her patients floss their teeth. Which samples are biased? Check all that apply. all her pa

tients patients with no cavities patients younger than 18 every 20th patient every patient with braces
Mathematics
2 answers:
natta225 [31]2 years ago
8 0

Answer: the answers are options B,C,and E or

patients with no cavities

patients younger than 18

every patient with braces

Step-by-step explanation: i got them right on edge

ArbitrLikvidat [17]2 years ago
7 0

Answer:

all her patients patients with no cavities

patients younger than 18

every patient with braces

Step-by-step explanation:

when a sample is selected in a manner that some elements, in this case patients, of population have higher or lower probability of sampling then that sample is biased.

From given case, all the following are biased samples

all her patients patients with no cavities

patients younger than 18

every patient with braces

because they are non-random sample of a population in which all other elements were not equally likely to be chosen!

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What value of b will cause the system to have an infinite number of solutions? A system of equations. y equals 6 x plus b. negat
mylen [45]

Answer:

b=-6

Step-by-step explanation:

we have

y=6x+b ----> equation A

-3x+\frac{1}{2}y=-3 -----> equation B

we know that

If equation A is the same of equation B, then the system of equations will have infinite solutions

Convert equation B in slope intercept form

Isolate the variable y

Multiply by 2 both sides to remove the fractions

-6x+y=-6

Adds 6x both sides

y=6x-6  -----> equation C (slope intercept form)

Equate equation A and equation C and solve for b

6x+b=6x-6  

b=-6

5 0
2 years ago
Read 2 more answers
A lumber yard has a scrap sheet of plywood that is 23 3/4 inches by 41 1/5 inches long what is the area of the plywood?
Sholpan [36]

Answer:

978\frac{1}{2}\text{ inches}^2.

Step-by-step explanation:

We have been given that a lumber yard has a scrap sheet of plywood that is 23 3/4 inches by 41 1/5 inches long.

Since plywood is in shape of rectangle, so to find the area of plywood we will multiply the length of plywood by its width.

\text{Area of rectangle}=\text{Length*Width}

\text{Area of plywood}=23\frac{3}{4}\text{ inches}\times 41\frac{1}{5}\text{ inches}

Let us convert our mixed fractions into improper fractions.

\text{Area of plywood}=\frac{95}{4}\text{ inches}\times \frac{206}{5}\text{ inches}

\text{Area of plywood}=\frac{95}{4}\times \frac{206}{5}\text{ inches}\times \text{inches}

Upon cancelling out greatest common factors we will get,

\text{Area of plywood}=\frac{19}{2}\times 103\text{ inches}^2

\text{Area of plywood}=\frac{1957}{2}\text{ inches}^2  

Now let us convert our answer into mixed fraction.

\text{Area of plywood}=978\frac{1}{2}\text{ inches}^2  

Therefore, the area of plywood is 978\frac{1}{2}\text{ inches}^2.

8 0
2 years ago
261, 256, 251, ...<br> Find the 46th term
slava [35]

Answer:

46th term is 36.

Step-by-step explanation:

we need to subtract like this..

251-5=246,246-5=241.likewise the 46th term is 36

5 0
2 years ago
Read 2 more answers
On Saturday, Craig rode his bike 5/8 of a mile. On Saturday, he rode his bike 1/2 of a mile. Craig added 5/8+1/2=6/10and plotted
VashaNatasha [74]
* Craig's answer is not reasonable because to add fractions the denominators must be the same.

** Total distance = 5/8 + 1/2 = 5/8 + 4/8 = 9/8 miles

*** Using the line number to prove the answer:
The line number that represents the problem is in the attached figure.
while the distance between 0 and 1 divided to 8 sections
to represent (5/8) count 5 sections from zero ⇒⇒⇒ point (a)
and to represent (1/2) it is the midpoint between 0 and 1 which mean it is 4 sections but it will be counted from point (a) so, adding 4 sections to point (a) the result will be the point (b)
So, counting from 0 to point (b) will give us 9 sections
and while one section represents (1/8)
So the total distance will be 9 * (1/8) = 9/8 which is agree with the result obtained before

3 0
2 years ago
If (a^3+27)=(a+3)(a^2+ma+9) then m equals
Ronch [10]

Answer:

m = - 3

Step-by-step explanation:

a³ + 27 ← is a sum of cubes and factors in general as

a³ + b³ = (a + b)(a² - ab + b²), thus

a³ + 27

= a³ + 3³

= (a + 3)(a² - 3a + 9)

comparing a² - 3a + 9 to a² + ma + 9, then

m = - 3

7 0
2 years ago
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