Ask question

Ask question

All categories

3 years ago

6

Jason stops at a ball-toss game at the carnival. The sign reads," Three balls for 40 ¢ or or 6 balls for 60¢." what percent does

he save by buying one set of six balls instead of two sets of three balls? please help me with this

1 answer:

zubka84 [21]3 years ago

4 0

So he save 40 % if it is 100pence

You might be interested in

Oksana_A [137]

Step-by-step explanation:

I don't know please mark as brilliant please

8 0

3 years ago

In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0

Zigmanuir [339]

Answer:

a) 8.2962

b) 6.3956

c) 3.845

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 5.6, \sigma = 2.6$

(a) What response represents the 85th percentile? 

This is X when Z has a pvalue of 0.85. So X when Z = 1.037.

$Z = \frac{X - \mu}{\sigma}$

$1.037 = \frac{X - 5.6}{2.6}$

$X - 5.6 = 2.6*1.037$

$X = 8.2962$

(b) What response represents the 62nd percentile?

This is X when Z has a pvalue of 0.62. So X when Z = 0.306.

$Z = \frac{X - \mu}{\sigma}$

$0.306 = \frac{X - 5.6}{2.6}$

$X - 5.6 = 2.6*0.306$

$X = 6.3956$

(c) What response represents the first quartile?

The first quartile is the 100/4 = 25th percentile. So this is X when Z has a pvalue of 0.25, so X when Z = -0.675.

$Z = \frac{X - \mu}{\sigma}$

$-0.675 = \frac{X - 5.6}{2.6}$

$X - 5.6 = 2.6*(-0.675)$

$X = 3.845$

3 0

3 years ago

To go on the class trip, chang needs at least $125. he has saved $45, and he makes $7 an hour at his job. what is the minimum nu

Murljashka [212]

The total amount that Chang will received from his wages is the product of his hourly wage times the number of hours he has worked (n). His total savings should not be less than $125. The equation that best describes the situation is,
45 + 7n ≥ 125
Solving for n in the inequality gives an answer of n≥11.42 hours. Thus, he needs to work for at least 12 hours.

6 0

3 years ago

Read 2 more answers

Helppppp! please show your work!

Shtirlitz [24]

Answer:

90 - 37 will give a solid 53

Step-by-step explanation:

the two sums of A to C to C to B so 22.9(C, B) and 14.1 (A, C)

and know that this angle is 90 degrees, my guess would be to subtract the to given numbers with degrees to earn the sum so 22.9 + 14.1 equals 37

now we add angle degrees and sum and subtract one another,

90 - 37

6 0

3 years ago

Solve by elimination <br> 5x-15y=10<br> 3x-5y=-6

Dovator [93]

Multiply bottom equation by -3 to add and eliminate y’s.

So...

5x-15y=10
+-9x+15y=18

You get -4x=28 so x=-7

Plug in to get y
5(-7)-15y=10
-35-15y=10
-15y=45
So y=-3

Check in other equation
3(-7)-5(-3)=
-21+15=-6

So x= -7 and y= -3

6 0

3 years ago