All categories

3 years ago

ANSWER PLS!! HELP! WILL GIVE BRAINLIEST

Mathematics

2 answers:

NeTakaya3 years ago

5 0

For this case we have that the temperature drops steadily at a speed of ${\sf0.8\:\frac{degree}{hours}}$ , that is, every hour drops 0.8 degrees. So, we can propose a rule of three:

1 hour ----------> 0.8 degrees

x ------------------> 4.4 degrees

Where the variable "x" represents the number of hours that must pass for the temperature to decrease by 4.4 degrees.

${\sf{x\:=\:\frac{4.4\:x\:1}{0.8}$

${\sf{x\:=\:5.5$

Thus, for the temperature to decrease by 4.4 degrees, 5.5 hours must pass.

<u>Answer:</u>

5.5 hours

malfutka [58]3 years ago

4 0

Answer:

5.5 hrs

Step-by-step explanation:

1 hr --> -0.8 hrs

? --> -4.4°C

-4.4 / -0.8 = 5.5 hrs

You might be interested in

The table represents a bicycle rental cost in dollars as a

Ainat [17]

Answer:

(a) This function represents a direct variation because it passes through the origin and has a constant rate of change of $5 per hour.

Step-by-step explanation:

The equation of direct variation is ...

y = kx

for some constant k. Here, we have x in hours and y in dollars. We can see if k is constant for the values given in the table.

<h3>constant of variation</h3>

Solving the direct variation formula for k, we have ...

k = y/x

Using the table values, we can see if this is constant:

k = dollars/hour = 10/2 = 20/4 = 30/6 = 40/8 = 5

The "rate of change" is constant at $5 per hour.

The function represents direct variation because it passes through the origin and has a constant rate of change of $5 per hour.

3 0

2 years ago

The square of five is

Mars2501 [29]

Square of five = 5^2 = 5 x 5 = 25

answer
c) 25

6 0

3 years ago

Given the data points, (x, y) of a linear function: (2, 11), (4, 10), (6, 9), (12, 6), what is the function? What is the slope?

NeX [460]

Answer:

The function is $y~=~12 ~-~ 0.5 \cdot x$ .

The slope is $m=-0.5$ .

The y-intercept is $b=12$ .

Step-by-step explanation:

Our aim is to calculate the values <em>m</em> (slope) and <em>b</em> (y-intercept) in the equation of a line :

$y=mx+b$

We have the following data:

$\begin{array}{c|cccc}x&2&4&6&12\\y&11&10&9&6\end{array}$

To find the line of best fit for the points given, you must:

Step 1: Find $X\cdot Y$ and $X\cdot X$ as it was done in the table below.

Step 2: Find the sum of every column:

$\sum{X} = 24 ~,~ \sum{Y} = 36 ~,~ \sum{X \cdot Y} = 188 ~,~ \sum{X^2} = 200$

Step 3: Use the following equations to find <em>b</em> and <em>m</em>:

$\begin{aligned} b &= \frac{\sum{Y} \cdot \sum{X^2} - \sum{X} \cdot \sum{XY} }{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 36 \cdot 200 - 24 \cdot 188}{ 4 \cdot 200 - 24^2} \approx 12 \\ \\m &= \frac{ n \cdot \sum{XY} - \sum{X} \cdot \sum{Y}}{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 4 \cdot 188 - 24 \cdot 36 }{ 4 \cdot 200 - \left( 24 \right)^2} \approx -0.5\end{aligned}$