To increase or decrease an amount by 30% what single multiplier would you use?

Answers

Answer 1

Answer: 100%-30%=70%
100%+30%=130%

to decrese by 30%, multiply by 70%
to increase by 30%, multiply by 130%

Answer 2

Answer: i think that would be x 30/100

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ages of edna,ellie and elsa are consequtive integers the sum of their age is 117. their ages are from youngest to oldest. please help.

Answers

If they were all the same age, then it would be (117 / 3) = 39.

But they're not. So make one of them 40 and another one 38, and
they'll still add up to 117 .

Their ages are 38, 39, and 40 .

What I can't figure out is how three nice women born in the 1970s
wound up with names like that.

A bowl contains 8 blue marbles and 5 green marbles. Elizabeth randomly draws 4 marbles form the bowl. she does not replace the marbles after each draw. what is the probability that she draws 1 blue marble and 3 green marbles?A. 4/13
B. 13/143
C. 4/143
D. 16/143

Answers

since she puts the marbles back, these events are dependent on each other
so
probability=(desired outcomes)/(total possilbe)
8+5=13=total
probailigy of blue=8/13
gree=5/13
so if she draws theem in that order then
8/13 times (since there is one less, -1 of 13) 5/12 times (assume 1 grreen was drawn from previus drawing) 4/11 times (assume as previus) 3/10

so
8/13 times 5/12 times 4/11 times 3/10=4/143=C

the answer is C 4/143

the speedy fast ski resort has started to keep track of the number of skiers and snowboarders who bought season passes. the ratio of the number of skiers who bought season passes to the number of snowboarders who bought season passes is 1:2. if 1259 more snowboarders bought season passer than skiers, how many snowboarders ams how many skiers bought season passes?

Answers

1259 is half the number of snowboarders because of 1:2 ratio
From this we find that the number of snowboarders is double this and that 1259 is the number of skiers

Which of the following characteristics of experiments are not also characteristics of surveys? Check all that apply.A. Statistical analysis is applied to the results of the study.
B. The study compares two or more treatments (possibly including "no treatment").
C. Data are gathered during the course of the study.
D. The study involves one or more treatment groups and a control group.
E. Replication with different groups of subjects can improve the reliability of the study.

Answers

The following characteristics of experiments are not also characteristics of surveys:
- The first one is B. The study compares two or more treatments (possibly including "no treatment").
- The other one is D. The study involves one or more treatment groups and a control group.

Answer:

B and D

Step-by-step explanation:

Surveys are only tested with one group

The times it took for 35 loggerhead sea turtle eggs to hatch in a simple random sample are normally distributed, with a mean of 50 days and a standard deviation of 2 days. Assuming a 95% confidence level, what is the margin of error for the population mean? A) 0.06. B) 0.11. C) 0.34. D) 0.66

Answers

The margin of error for the population mean is C) 0.34. Hope that helps.

Answer:from what I did it was 0.66

Step-by-step explanation:

Sarah saved $15 buying the dressat a 20%-off sale. What was the
regular price of the dress?

Answers

Answer:

$18

Step-by-step explanation:

since she saved 20% you turn the percentage into a decimal which is .20 then multiply it by 15 because that's how much she saved and you get $3 which you add to $15 and you get the regular price which is $18

The price is $18 because you change the 20% to .20 and multiply it by 15 which gives you $3and then you add which gives you your answer.

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Lisa leaves her house for a road trip and drives at a rate of 50 mph. Keisha leaves her house 1 hour later and drives along the same route at a rate of 60 mph. At any given time t, the distance traveled can be calculated using the formula d = rt, where d represents distance and r represents rate. Which system of equations can be used to find how long after Lisa departs her house she is passed by Keisha?A) d=50t d=60t-1 B) d=50t d=60(t-1) C) d=50t d=59t D) d=50(t-1) d=60t

A bag of concrete equals 1000 cu. Inches. Your customer already has 2 bags at home. How many more bags does he need to fill an area of 5’ x 10” x 10”? ________

Can someone help me plz

Which steps will verify that a parallelogram is a rectangle? Check all that apply.Calculate the lengths of the diagonals, and show that they are equal. Calculate the lengths of all sides, and show that both pairs of opposite sides are congruent. Calculate the slope of each diagonal, and show that the lines are perpendicular. Calculate the midpoints of each diagonal, and show the diagonals bisect each other. Calculate the slopes of every side, and show that adjacent sides are perpendicular.