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yan [13]
3 years ago
7

A point estimate for the difference between the mean purchases of the users of the two credit cards is:

Mathematics
1 answer:
WARRIOR [948]3 years ago
3 0

Answer: D. (15)

The sample Mean of the two credit cards given are $140 and $125 respectively.

The difference between the mean purchase of the two cards gives:

$140 - $125 =$15

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8. myles had 103 coins in a jar - all nickels, dimes, and quarters. if the total value of the coins is $15
Ivanshal [37]

If the total value of the coins is $15. The number of each type of coin is: 31 quarters, 72 dimes.

<h3>Number of each type of coin</h3>

Let D = number of dimes

Let Q = the number of quarters

Equations

d + q = 103

0.10d + 0.25q = 15  

d = 103 -q

0.10(103 -q) + 0.25q = 15

10.3 - 0.10q + 0.25q = 15

0.15q = 4.7

q=4.7/0.15

q=31 quarters

Substitute q into second equation

D+31=103

D=72 dimes

Therefore the number of each type of coin is: 31 quarters, 72 dimes.

Learn more number of each coin here:brainly.com/question/13934075

#SPJ1

5 0
2 years ago
Puteti sa ma ajutati va rog? Vreau solutii cu explicatie elaborata, nu doar raspunsul. Multumesc.
almond37 [142]
I don’t speak Spanish but if you put the English trans in the comments I’d love to answer
6 0
3 years ago
0.355555555... as a fraction
Pie

Answer:

7111/2000...........

5 0
3 years ago
Find the probability that the sum is as stated when a pair of dice is rolled. (enter your answers as fractions.) (a) odd and les
Dmitry_Shevchenko [17]
|Ω| = 6 - number of all results
A = {1, 3} → |A| = 2 - number of (a) results
P(A) = 2/6 = 1/3

8 0
3 years ago
What is the slope of the line whose equation is 2x−4y=10 ?
Olenka [21]

solve for y

2x−4y=10  

-2x       -2x      subtract -2x from both sides

-4y = -2x +10

-4            -4    Divide both sides by -4 (coefficient on y)

y = -2/-4x  + 10/-4

y = 1/2x - 5/2


the slope is the number on the x (coefficient)

and its 1/2

6 0
3 years ago
Read 2 more answers
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