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3 years ago

7

Will give brainliest to the one who gets it right and helps the most!

1 answer:

VARVARA [1.3K]3 years ago

7 0

4. b) 30

5. c) y=2/3x+9

6. y=2x-5

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La temperatura de un congelador bajó de 3 °C a −9 °C en 3 horas. Si la temperatura del congelador bajó en la misma cantidad de g

Liula [17]

En este problema observamos que la temperatura del congelador desciende <em>linealmente</em> con el paso del tiempo, es decir, conforme al siguiente modelo:

$T(t) = T_{o} + \frac{\Delta T}{\Delta t}\cdot t$ (1)

Donde:

$T_{o}$ - Temperatura inicial, en grados Celsius.
$\Delta T$ - Cambio total de la temperatura, en grados Celsius.
$\Delta t$ - Cambio total en el tiempo, en horas.
$t$ - Tiempo, en horas.

Si sabemos que $T_{o} = 3\,^{\circ}C$ , $\Delta T = -12\,^{\circ}C$ . $\Delta t = 3\,h$ y $t = 1\,h$ , entonces la temperatura del congelador al completarse la primera hora es:

$T(1\,h) = 3\,^{\circ}C + \left(\frac{-12\,^{\circ}C}{3\,h} \right)\cdot (1\,h)$

$T(1\,h) = -1\,^{\circ}C$

El congelador tenía una temperatura de -1 °C a la primera hora.

Invitamos cordialmente a ver esta pregunta sobre temperaturas: brainly.com/question/21677542

3 0

2 years ago

PLEASE ANSWER QUICK!!! 30 POINTS

shusha [124]

Answer:

Solution given;

<ABD=<BAC+<ACB

<u>Since</u><u> </u><u>exterior</u><u> </u><u>angle</u><u> </u><u>of</u><u> </u><u>a</u><u> </u><u>triangle</u><u> </u><u>is</u><u> </u><u>equal</u><u> </u><u>to</u><u> </u><u>the</u><u> </u><u>sum</u><u> </u><u>of</u><u> </u><u>two</u><u> </u><u>opposite</u><u> </u><u>interior</u><u> </u><u>angle</u>

26x+20=19x-15+9x+25

solve like terms

26x+20=28x+10

subtracting both by 10

26x+20-10=28x+10-10

Subtracting both side by 26x

10=28x-26x

2x=10

dividing both side by 2

2x/2=10/2

x=5

Now

<ABD=26*5+20=l50°

<u>T</u><u>h</u><u>e</u><u> </u><u>v</u><u>a</u><u>l</u><u>u</u><u>e</u><u> </u><u>o</u><u>f</u><u> </u><u><</u><u>A</u><u>B</u><u>D</u><u> </u><u>i</u><u>s</u><u> </u><u>1</u><u>5</u><u>0</u><u>°</u>

4 0

3 years ago

Read 2 more answers

Seven less than the quotient of x and 9

bulgar [2K]

X/9 - 7 is the answer. note x/9 is in fraction form

8 0

3 years ago

What is 41/90 as a decimal

Vera_Pavlovna [14]

Answer:

2.05

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Amy is solving the equation using the steps shown.

Delicious77 [7]

The correct next step Amy could take is to factor (x^2 - 16) on the left side of the equation to yield (x + 4)(x – 4)(x + 2) = 0.

The equation is given as:

$\mathbf{(x^2 - 16)(x + 2) = 0}$

The possible next steps are:

1. Expand the equation as follows

$\mathbf{x^3+2x^2-16x-32 = 0}$

2. Express x^2 -16 as a difference of two squares as follows

$\mathbf{(x + 4)(x- 4)(x + 2) = 0}$

However, the correct step in this case is to factor x^2 - 16 as a difference of two squares to give $\mathbf{(x + 4)(x- 4)(x + 2) = 0}$

This is so, because the question says Amy is trying to solve for variable x.

This step will ensure that she gets the possible values of x, unlike expanding the whole equation .

Hence, the correct next step is $\mathbf{(x + 4)(x- 4)(x + 2) = 0}$

Read more about equations at:

brainly.com/question/7674413

7 0

2 years ago