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Stells [14]
3 years ago
9

Dr. Anderson found that 18 out of 30 children in the village tested positive for chicken pox. At this rate, how many would test

negative if there were 70 children in the village as a whole
Mathematics
1 answer:
Artist 52 [7]3 years ago
6 0

Answer:number of children negative for chicken pox=28

Step-by-step explanation:

Number of  children positive for chicken pox =18 out of 30

Therefore number  of children negative for chicken pox is 12 out of 30 ie ( 30-18)

Such that the ratio of positive tested chicken pox children to negative tested chicken pox children =18:12

Therefore  total ratio =18 +12=30

Suppose there are 70 children,then number of children negative for chicken pox =

12/30 x 70  =28

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Use the geometric mean to find the 7th term in a geometric sequence if the 6th term is 12 and the 8th term is 27. 20 19.5 18 17
Lesechka [4]
A₆ =12

a₇ = ?? = x

a₈ 27

In this case x is the geometric mean & as per the formula
geometric mean of 2 numbers =√(a₆ * a₈) = √(12*27)
& x=18.
Proof:
Find the common ratio between a₇ & a₆ ==> = ( x) / 12
now find the common ration between a₈ & a₇ ===> =27 / (x)
x/12 = 27/x ===> x² = 12*27 ==> x² = 324 & x =√324 = 18
7 0
3 years ago
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Alenkasestr [34]
M = -1/2
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8 0
3 years ago
Which of the following is an equivalent form of the compound inequality
blondinia [14]

Answer:

pls mark brainy

Step-by-step explanation:

option (d) is correct.

An equivalent form of the  given compound inequality −44 > −2x − 8 ≥ −8 is  −44 > −2x − 8 and −2x − 8 ≥ −8

Step-by-step explanation:

Given a compound inequality −44 > −2x − 8 ≥ −8

We have to write  an equivalent form of compound inequality.

Compound inequality  consists of two inequalities joined together and the solution is the intersection of each inequality.

Compound inequality has two sides the left hand side and right hand side we can solve them by taking each inequality one at a time.

For given compound inequality, −44 > −2x − 8 ≥ −8

we have

Left side of inequality as  −44 > −2x − 8

and right side of inequality as  −2x − 8 ≥ −8

Thus, option (d) is correct.

Thus, An equivalent form of the  given compound inequality −44 > −2x − 8 ≥ −8 is  −44 > −2x − 8 and −2x − 8 ≥ −8

3 0
2 years ago
Someone help me please !!
Fantom [35]
Answer: A) 60°
The inscribed angle is half the measure of the arc.
3 0
2 years ago
Help me with my test
igor_vitrenko [27]

Answer:c

d

Step-by-step explanation:

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5 0
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