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viva [34]
3 years ago
14

A farmer has a sack of grain, a chicken and a fox. He has to get them across the river and he can't go around or fly but he does

have a boat. He can only take one thing at a time across the river. How can he get them across?
Mathematics
1 answer:
snow_tiger [21]3 years ago
7 0
<span>

</span><span>http://www.squiglysplayhouse.com/BrainTeasers/bt.php?id=119
 this should help</span>
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Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now. Ralph's
IgorLugansk [536]
Let
R = Ralph's age
S = Sara's age

First statement is translated as:
S = 3R

Second statement is translated as:
S + 4 = 2(R + 4)

Use the first equation to be substituted into the second one in terms of R which is the one we are actually going to solve for Ralph's age.
Since S = 3R, then
3R + 4 = 2(R + 4)
3R + 4 = 2R + 8
3R - 2R = 8 - 4
R = 4 years old
7 0
3 years ago
Read 2 more answers
What is the solution of 3+(x-2/x-3)&lt;=4
Minchanka [31]

Answer: x < 3

Step-by-step explanation:

Solve the rational inequality by combining expressions and isolating the variable x.

7 0
3 years ago
Use an algebraic rule to describe a translation right 4 units and down 2 units.
Harlamova29_29 [7]
Do you have any options to pick from
4 0
3 years ago
On day two of a study on body temperatures, 106 temperatures were taken. Suppose that we only have the first 10 temperatures to
Hitman42 [59]

Answer:

The 95% confidence interval = (98.225, 98.655)

Step-by-step explanation:

The formula for Confidence Interval =

Mean ± z × standard deviation/√n

Where Mean = 98.44°F

Standard deviation = 0.30°F

n = number of samples is 10

Because our number if samples is small, we use the t score confidence interval formula

Mean ± t × standard deviation/√n

Degrees of Freedom = n - 1

= 10 - 1 = 9

We find the t score of 95% confidence interval and degrees of freedom 9

= 2.262

Hence,

Confidence interval = 98.44 ± 2.262 × 0.30/√10

= 98.44 ± 0.214592162

Confidence Interval

98.44 - 0.214592162

= 98.225407838

≈ 98.225

98.44 + 0.214592162

= 98.654592162

≈ 98.655

The 95% confidence interval = (98.225, 98.655)

5 0
3 years ago
How many times will 1/4 go into 2 2/4
Scilla [17]
Well, there are 4 of 1/4 in each whole number. there is two whole numbers, so that makes 8 of 1/4's. Now we add the two in the fraction and we come out with 10. 1/4 can go into 2 2/4 10 times.
7 0
3 years ago
Read 2 more answers
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