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2 years ago

Isla walked 3/4 miles each way to and from the school Wednesday. How many miles did Isla walk that day?

Mathematics

2 answers:

attashe74 [19]2 years ago

8 0

1 1/2 is the answer 1 and 1 half

jolli1 [7]2 years ago

5 0

All you have to do is multiply 3/4 of a mile times two because she walked round trip. The answer is 1.5 miles

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Kelly blends coffee. She mixes brand A costing $6 per kilogram with brand B costing $8 per kilogram. How many kilograms of each

sukhopar [10]

Step-by-step explanation:

Let

be the kg of coffee of brand A in the mix and

be the kg of coffee of brand B in the mix.

The total kg must be

The cost per kg of the mix must br

7.20

. For this, the total cost of the mix will be

, so the total cost per kg of the mix will be

7.20

Now that we have our two equations, we can solve.

7.20

⋅

360

From the first equation, we can multiply both sides by

to get:

300

Subtracting, we get:

Thus, we need

kg of brand B in our mix. This means that

−

kg will be of brand A.

6 0

1 year ago

The value of the coefficient of correlation ( r) a. can never be equal to the value of the coefficient of determination (r2). b.

gulaghasi [49]

Answer:

d. can be equal to the value of the coefficient of determination (r2).

True on the special case when r =1 we have that $r^2 = 1$

Step-by-step explanation:

We need to remember that the correlation coefficient is a measure to analyze the goodness of fit for a model and is given by:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

The determination coefficient is given by $R= r^2$

Let's analyze one by one the possible options:

a. can never be equal to the value of the coefficient of determination (r2).

False if r = 1 then $r^2 = 1$

b. is always larger than the value of the coefficient of determination (r2).

False not always if r= 1 we have that $r^2 =1$ and we don't satisfy the condition

c. is always smaller than the value of the coefficient of determination (r2).

False again if r =1 then we have $r^2 = 1$ and we don't satisfy the condition

d. can be equal to the value of the coefficient of determination (r2).

True on the special case when r =1 we have that $r^2 = 1$

7 0

2 years ago

Phil received a prize of xxx dollars from a poker tournament. The tournament cost him 100100100 dollars to enter.

nikitadnepr [17]

Answer:

$(x-100)

Step-by-step explanation:

Phil entered the poker tournament with $100.
He received a price of $x.

His net winnings from the tournament will be the price minus the entry fee.

Therefore:

Phil's net winnings=$(x-100)

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2 years ago

A computer store sells computers for 10% more than they pay for them. If the store pays x dollars for a computer, which expressi

Olenka [21]

Answer: what

Step-by-step explanation:

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1 year ago

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Briana is excited because she has just been hired by a family to babysit on Saturdays. She’s looking forward to earning some ext

alexandr402 [8]

List the hours from 1 to 8

Multiply the hours by how much she is paid per hour ( $12)

X: 1, 2, 3, 4, 5, 6, 7, 8

y: 12, 24, 36, 48, 60, 72, 84, 96

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2 years ago