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Hatshy [7]
3 years ago
7

a nutrition major at wright state was studying the relationship between carbohydrates (x) and calories (y). for example, a servi

ng of a particular brand of wheat pasta yielded 42 carbohydrates and 210 calories. after collecting x and y data on many kinds of foods, the student determined the slope of the regression line to be 4.0 and the y intercept to be 3.0. if a new food is tested, and the number of carbohydrates (x) is 100, what would be the predicted calories (y’)?
Mathematics
1 answer:
VLD [36.1K]3 years ago
6 0

Answer:

The predicted calories would be 403 calories.

Step-by-step explanation:

We have a linear regression model relating y: calories with x: carbohydrates, which has a slope of 4.0 and a y-intercept of 3.0.

Then, the model equation is:

y=4.0x+3.0

With these model we can predict the calories values for any amount of carbohydrates, within the interval within which this model is valid.

If a new food is tested, and the number of carbohydrates (x) is 100, the predicted value will be:

y(100)=4.0(100)+3.0=400+3=403

The predicted calories would be 403 calories.

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Help me! I need this Urgent
lesya692 [45]

Answer:

96.

Step-by-step explanation:

1) if the scale is 1.5:3[ft], then the real lengths are: 12, 16 and 20 [ft];

2) the required area of the real triangle is:

A=0.5*12*16=96 [ft²].

4 0
2 years ago
if you share the costs of a meal on the ratio of 2:3 and one person pays £52.20 how much was the whole meal?
Tju [1.3M]
<em>The ratio of shared costs of mean=2:3.
One person paid the cost </em>
£<em>52.20, so let the other person paid the cost be X.
</em>
<em>(2/3)=(52.20/X)
</em><em>X=(52.20</em>×3)/2
X=26.10×3
X=78.30
So the gross cost paid by both the person = £(78.30+52.20)
⇒£130.60
4 0
3 years ago
un hotel tiene habitaciones dobles y sencillas. dispone en total de 50 habitaciones y 87 camas ¿cuántas habitaciones tiene cada
Alex777 [14]

Answer:

En el hotel hay 13 habitaciones sencillas y 37 habitaciones dobles.

Step-by-step explanation:

Un sistema de ecuaciones lineales es un conjunto de dos o más ecuaciones de primer grado, en el cual se relacionan dos o más incógnitas.

Resolver un sistema de ecuaciones consiste en encontrar el valor de cada incógnita para que se cumplan todas las ecuaciones del sistema.

En este caso, las variables que se definen son:

  • x: habitaciones simples
  • y: habitaciones dobles

Entonces, el hotel dispone en total de 50 habitaciones, por lo que se plantea la ecuación:

x + y= 50

El hotel dispone de 87 camas. La cantidad de camas por habitación puede ser expresada mediante:

x + 2*y= 87

Entonces el sistema de ecuaciones a resolver es:

\left \{ {{x+y=50} \atop {x+2*y=87}} \right.

El método de sustitución consiste en despejar o aislar una de las incógnitas, por ejemplo x , y sustituir su expresión en la otra ecuación. De este modo, obtienes una ecuación de primer grado con la otra incógnita,  y . Una vez resuelta, calculas el valor de  x  sustituyendo el valor de  y ya conocido.

En este caso, despejando x de la primer ecuación:

x= 50 -y

y reemplazando en la segunda ecuación obtienes:

50 -y + 2*y=87

-y + 2*y=87 -50

y= 37

Reemplazando en la expresión x= 50 -y obtienes:

x= 50 -37= 50-37

x= 13

Recordando que x representa la cantidad de habitaciones sencillas e y la cantidad de habitaciones dobles, <u><em>en el hotel hay 13 habitaciones sencillas y 37 habitaciones dobles.</em></u>

3 0
3 years ago
Monique runs 1/4 mile five times a week. How many miles does she run each week?
dlinn [17]

Answer:

1 and 1/4 of a mile each week

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
There are 26 prize tickets in a bowl, labeled A to Z. What is the probability that a prize ticket with a vowel will be chosen, n
e-lub [12.9K]

Using it's concept, there is a 0.0308 = 3.08% probability that a prize ticket with a vowel will be chosen, not replaced, and then another prize ticket with a vowel will be chosen. Since the letter is not replaced, the number of outcomes change, hence they are dependent.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

For the first ticket, since 5 out of 26 letters are vogal, the probability is:

5/26.

For the second ticket, since there is no replacement, the probability is:

4/25.

The probability of both tickets is:

p = \frac{5}{26} \times \frac{4}{25} = 0.0308

0.0308 = 3.08% probability that a prize ticket with a vowel will be chosen, not replaced, and then another prize ticket with a vowel will be chosen. Since the letter is not replaced, the number of outcomes change, hence they are dependent.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

8 0
3 years ago
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