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3 years ago

You have been keeping track of the outside temperature for a class project.

Mathematics

1 answer:

poizon [28]3 years ago

3 0

The percent change between the temperature at noon and the temperature at 5:00 p.m. is -20%

The percent change is the relative change between two quantities expressed in percentage.

Given that the At noon, the temperature was 80°F while At 5:00 p.m., the temperature was 64°F. Hence:

Percent change = [(64°F - 80°F) / 80°F] * 100%

Percent change = -20%

Therefore the percent change between the temperature at noon and the temperature at 5:00 p.m. is -20%

Find out more at: brainly.com/question/17968508

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Peyton borrowed some money from her friend in order to help buy a new video game system and agreed to pay the friend back a cons

netineya [11]

Answer:

$y=200-25x$

Step-by-step explanation:

According to the problem, the initial condition is $200. If he owed $100 after 4 weeks, that means he paid $25 per week, so that would be the constant ratio. Therefore, the expression would be:

$y=200-25x$

Where $y$ represents the amount owed, and $x$ represents weeks.

So, in the 4 week, that is, $x=4$ he owed:

$y=200-25(4)=200-100=100$

As you can observe, the relation we found first perfectly to the problem. So, the final expression that model this problem is

$y=200-25x$

8 0

3 years ago

Luis

Scorpion4ik [409]

Answer:

Espero y esto te ayude :) si me falto algo lo siento.

Step-by-step explanation:

Si se oferta un producto al 10% de descuento, esto significa que el precio final del producto será 90% del precio original. Para hallar estos datos, debemos usar una regla de tres, de la siguiente forma:

100% 90%

-------------------- → ---------------------------

Precio Original Precio con Descuento?

SARAPES

- Ana: descuento (14), precio rebajado 126

Precio rebajado = 140.90 / 100 = 126

Descuento: 140 - 126 = 14

- Javier: descuento (8), precio rebajado 72

Precio rebajado = 80.90 / 100 = 72

Descuento: 80 - 72 = 8

ARETES

- Luis: descuento (5), precio rebajado 72

Precio rebajado = 50.90 / 100 = 45

Descuento: 50 - 45 = 5

- Ana: Precio original (60) , descuento (6), precio rebajado 54

Precio original: X.0,10 = 6

X = 60

Precio rebajado: 60 - 6 = 54

- Javier: Precio original (40) , descuento (4), precio rebajado 36

Precio original: X.0,10 = 4

X = 40

Precio rebajado: 40 - 4 = 36

6 0

3 years ago

Given z1 and z2, what is the midpoint?<br><br> z1=5-7i and z2=-9+3i.

sveta [45]

Answer:

$7-2i$

Step-by-step explanation:

As you're used to do in the real plane, midpoint is the average of Real and Imaginary part. So $\frac{5+9}2 +i \frac{-7+3}2 = \frac{14}2+i\frac{-4}2 = 7-2i$

7 0

3 years ago

Evaluate the upper and lower sums for f(x) = 1 + x2, −1 ≤ x ≤ 1, with n = 3 and 4.

Elenna [48]

I'm going to assume that your function is f(x) = 1 + x^2 (NOT x2).

I suspect you're trying to estimate the "area under the curve of f(x) = 1 + x^2. You need to use this or a similar description to explain what you're doing.

Also, you need to specify whether you want "left end points" or "right end points" or "midpoints." Again I must assume you want one or the other (and will assume that you meant "left end points").

First, let's address the case n=3. You must graph f(x) = 1 + x^2 between -1 and +1. We will find the "lower sum," using "left end points." The 3 x-values are {-1, -1/3, 1/3}. Evaluate the function f(x) = 1 + x^2 at these 3 x-values. Keep in mind that the interval width is 2/3.
The function (y) values are {0, 2/3, 4/3}.

Sorry, Michael, but I must stop here and await clarification from you regarding what you've been told to do in this problem. Otherwise too much guessing (regarding what you meant) is necessary. Please review the original problem and ensure that you have copied it exactly as presented, and also please verify whether this problem does indeed involve estimating areas under curves between starting and ending x-values.

7 0

3 years ago

The product of 9 and a number, diminished by 7?

kompoz [17]

The equation for this will be 9n-7

The short definition of diminished means subtract

5 0

4 years ago