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2 years ago

Joseph drives 125 miles in 2 and 1/2 hours. At the same rate,how far will he be able to travel in 6 hours

Mathematics

1 answer:

pshichka [43]2 years ago

3 0

300 miles You would do 125/2.5= 50 Then you a would do 50*6=300

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jeyben [28]

Answer:

I,R,I,I,R,I,R,R,I,R,I,R,I,I,R,R,I,I,I,I

Step-by-step explanation:

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3 years ago

How heavy a load (pounds) is needed to pull apart pieces of wood 4 inches long and 1.5 inches square? Here are data from student

statuscvo [17]

Answer:

a. (29526.192 , 32155.808)

b. (29673.9301 , 32008.0699)

Step-by-step explanation:

on calculation, we find that sample mean = 30843 and sample standard deviation = 3018.504, and n=20

Sample Mean = 30841

SD = 3000

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 670.8204

alpha (a) = 1 - 0.95 = 0.05

z critical value for 95% confidence interval:

z(a/2) = z(0.025) = 1.96

Margin of Error (ME) = z(a/2) x SE = 1314.808

95% confidence interval is given by:

Sample Mean +/- (Margin of Error) = 30841 +/- 1314.808

= (29526.192 , 32155.808)

2)when std dev of population is not known, we use sample's, but we have to use t instead of z

Sample Mean = 30841

SD = 3018.504

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 674.958

alpha (a) = 1-0.9 = 0.1

we use t-distribution as population standard deviation is unknown

t(a/2, n-1 ) = 1.7291

Margin of Error (ME) = t(a/2,n-1)x SE = 1167.0699

90% confidence interval is given by:

Sample Mean +/- (Margin of Error)

30841 +/- 1167.0699 = (29673.9301 , 32008.0699)

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3 years ago

You go down 8 floors in an elevator. Your friend goes up5 floors in an elevator. Write each amount as an integer.

Ivahew [28]

-8 and 5 (positive 5)

4 0

3 years ago

The larger of two positive integers is three more than the

katrin2010 [14]

Answer:

y=x+4

Step-by-step explanation:

So, let's start with the fact that we have two numbers. Let's call one of them "x" and the other one "y." Let's also assume that "y" is the larger number and "x" is the smaller number.

We know that both of them added together (the sum) gives us 74. Mathematically, that means:

x+y=74.

We also know that the larger number ("y") is 4 more than the smaller number ("x"). Another way to say this is, if you have the smaller number and add 4 more to it, you'll end up with the larger number. Mathematically, this means:

y=x+4

Since we know that y=x+4, we can put "x+4" into the first equation for "y", giving us:

x+(x+4)=74

Simplifying gives us:

2x+4=74

-4 -4

---------

2x=70

--- ---

2 2

x=35

Since we now know that x=35, and we know that y=x+4, we now know that:

y=(35)+4

y=39

Now that we have both of the numbers, we should check our work to ensure it's correct:

Does 39+35=74? Yes it does.

Is 39 (the larger of the two numbers) four more than the smallest number (35)? Yes it is.

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3 years ago

−2x=x^2 −6 from khan academy helppppppp please

masya89 [10]

This is in its simplest form.
There are no like terms to an operation

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2 years ago