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lys-0071 [83]
2 years ago
10

Kareem heats a beaker of water to a boil. Then he records that the water temperature decreases from 100°C to 19°C in 525 minutes

. What was the change in temperature each minute? Enter your answer in the box. °C
Mathematics
1 answer:
mixer [17]2 years ago
8 0

Answer:

Temperature of water in beaker decreased at rate of 0.15428^{o} C per minute.

Step-by-step explanation:

We are given:

\text{Initial temperature}=100^{o} C

\text{Temperature after 525 minutes}=19^{o} C

\text{ Change in temperature of water}=(100-19)^{o} C=81^{o} C

Now we will divide change of temperature by 525 minutes to find change in temperature of water per minute.

\text{ Change in temperature of water per minute}=\frac{81^{o} C}{525\text{ minutes}}

\text{ Change in temperature of water per minute}=\frac{0.15428^{o} C}{\text{ minute}}

Therefore, temperature of water decreased at rate of 0.15428^{o} C per minute.

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What are the dimensions of the rectangle shown below? Remember to use the axes on the coordinate grid to help you.
miskamm [114]
Keep in mind its been a while since i did this type of work lol.....

did you try to draw it out on a grid paper....what will be helpful is if you got the coordinates and put the points down and then if you connect the dots you get your shape now you will count the unis in which the width and length is timed. so like if you had grid and it gave you coordinates and you did all that now you will count how many units is in the width and how many in the length. 
 but your best answer might be 14 units x 4 units

3 0
2 years ago
Xy+(4(20))>x-5y(2+9-7)
prohojiy [21]

I'll solve for y xy+(4(20))>x-5y(2+9-7) 

xy+4(20)>x-5y(2+9-7) 

xy+4(20)>x-5y(4) 

xy+4(20)>x-20y 

xy+80>x-20y 

xy+20y+80>x 

y(x+20)>-80+x 

y>(-80+x)/(x+20)


3 0
2 years ago
−12x−5y=40 12x−11y=88 ​ x= y=
Nezavi [6.7K]
Add the two equations and use the elimination method. The x term will "cancel out" to be able to solve for the y term.

STEP 1
−12x−5y=40
12x−11y=88 ​
x terms "cancels out"; add y terms

-16y= 128
divide both sides by -16

y= -8


STEP 2
substitute y value into either original equation

12x−11y=88 ​

12x - 11(-8)= 88

12x + 88= 88
subtract 88 from both sides

12x= 0
divide both sides by 12; 0 divided by any number is 0

x= 0


ANSWER: x= 0; y= -8

Hope this helps! :)
6 0
2 years ago
Lenny sold 576 tacos in 48 hours what was lenny's average rate of tacos sales
cupoosta [38]
If your looking for hourly they sold a total of 12 tacos per hour.
If your looking for daily they sold a total of 288 tacos per day.
4 0
2 years ago
Read 2 more answers
Using two or more complete sentences, describe how to find the general rule for the arithmetic sequence with a4 = -1 and a6 = -1
adoni [48]

Answer:

Step-by-step explanation:

to find the arithmetic sequence with a4=-1 and a6=-13

first: find the difference: an=a+(n-1)d

a4=-1

that means a1+d(4-1)=-1 ( since a4 given and need to find a1)

a1+3d=-1 first equation

a1+d(6-1)=-13 ( a6 is given)

a1+5d=-13 second equation

a1+3d=-1

a1+5d=-13 ( find a and d by subtraction)

a1+3d-a1-5d=-1-(-13)

2d=12

d=-12/2=-6 ( substitute d in the equation: a1+3d=-1)

difference =-6

a1=17

a1,a2,a3,a4,a5,a6,....

the sequence is : 17,11,5,-1,-7,-13,.....

hope it works

5 0
2 years ago
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