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olya-2409 [2.1K]
3 years ago
10

Find the percent of change from 18 to 12.

Mathematics
1 answer:
melomori [17]3 years ago
8 0

Answer:

18 is the old value and 12 is the new value. In this case we have a negative change (decrease) of -33.33333333 percent because the new value is smaller than the old value.

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find the value of" A" such that triangle DEF with vertices D (a,1) , E(10,7) and F(7 ,11) is a right angle at E?​
Ronch [10]

a=2

Answer:

(m1) slope of DE=(7-1)/(10-a)=6/(10-a)

(m2) slope of EF=(11-7)/(7-10)=4/-3=-4/3

since line are perpendicular

m1m2=-1

6/(10-a) ×-4/3=-1

6/(10-a)=3/4

6×4=3(10-a)

24=30-3a

3a=30-24

a=6/3=2

4 0
3 years ago
A study was conducted to determine whether a new highway should be built next to the river in a town. Half of the residents in t
Tamiku [17]

Answer:

The sampling of this study is bias

Step-by-step explanation:

Sampling bias is a bias that is gotten during sampling where some members of the population have a lower representation or probability than others in the sample pool. In this case, only the residents living near a river was sampled, and because they are subjected to relatively the same conditions (living near a river), the result of the study will not be a true representation of every member of the town because the people living far away from the river will most likely have different opinions due to their different environmental exposure than the people living close to the river. The correct thing to have been done for the result to be reliable and accurate will be to sample at random, people in the two both close to and far away from the river, or to sample equal number of people each living close to and far away from the river.

Another example of sampling bias is a study to determine the effect of alcohol on pregnancy in women in America, and only pregnant white women who drink are sampled, leaving out Black or Hispanic  women, what ever result gotten in the study may hold true for white women in America, but it may not hold true for every woman in America

8 0
3 years ago
Plz help with this asap
Goryan [66]

Answer:

A, B and D

Step-by-step explanation:

7 goes in to 28 and 12 goes in to 32

14 goes into 28 and 16 gies i to 32

7 goes into 28 and 8 goes into 32

5 0
2 years ago
Read 2 more answers
BESTIES HELP ME PLEASE ANSWER THIS CORRECLTY, PLEASE TELL ME WHICH ONE OF THESE IS A LINEAR EQUATION, AND WHICH ONE IS NOT. YOU'
love history [14]

Answer:

Step-by-step explanation:

Which of what? There is no ss.

7 0
3 years ago
Tony wants to make 36 party bags. Glitter pens come in packs of 6. Stickers come in sheets of 4, and balls come in packs of 3. W
Fofino [41]
Do 6•6=36
4•9=36
3•12=36
So the answer is 12
3 0
3 years ago
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