1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vlada-n [284]
2 years ago
9

4. A scientist changes the temperature of a solution at a rate of -7°C per minute. How many minutes will it take for

Mathematics
1 answer:
igomit [66]2 years ago
6 0

Answer:

7 minutes

Step-by-step explanation:

The scientist changes the temperature for the solution at a rate of -7°C per minute. We need to find out how long it'll take for the solution's temperature to change from  0°C to -49°C. So, we divide -7 by -49 to find out how long it will take:

-49 / -7 = 7

It will take 7 minutes for the temperature to reach -49°C.

You might be interested in
I REALLY NEED HELP PLEASE
vaieri [72.5K]

Answer:

sin X =  12/13

cos X = 5/13

tan X = 12/5

Step-by-step explanation:

Recall the definitions as follows:

For a right triangle (i.e one angle is 90 deg) with one of the angles X

sin X = opposite side / hypotenuse

cos X = adjacent side / hypotenuse

tan X = opposite side / adjacent side

In our case for angle A, the following applies:

opposite = 36

adjacent = 15

hypotenuse = 39

hence

sin X = opposite side / hypotenuse = 36/39 = 12/13

cos X = adjacent side / hypotenuse = 15/39 = 5/13

tan X = opposite side / adjacent side = 36 /15 = 12/5

8 0
2 years ago
The smallest of three consecutive integers is 24 less than the sum of the two larger integers. Find the three integers.
harkovskaia [24]

Answer:

21, 22, 23

Step-by-step explanation:

Construct equations representing each piece of information.

Three consecutive integers are three numbers in a row, for example, 1, 2 and 3.

Let's let

Integer 1 = X

Integer 2 = Y

Integer 3 = Z

X = (Y + Z) - 24

We also know that

Y = X + 1

and Z = X + 2

We can now sub this information into the first equation. We do this so that we can have only one variable in the equation.

X = (X+1) + (X+2) - 24

now solve for x,

X = 2X + 3 - 24

X = 2X - 21

-X = - 21

X = 21

So, the integers are 21, 22, 23

3 0
2 years ago
Which statement must be true about the diagram?
sertanlavr [38]

Ray KM is an angle bisector of NKL.

8 0
2 years ago
Read 2 more answers
Jackson and his children went into a movie theater and where they sell bags of popcorn for $6.50 each and candies for $4 each. J
Lisa [10]

Answer:

There are no possible solutions for this question.

Step-by-step explanation:

3 0
3 years ago
What is b1 and r of geometrical sequence if b3 −b1 = 16 and b5 −b3 = 144.
Naily [24]

Answer:

b1 = 2 ; r = 3

Step-by-step explanation:

Given that :

if b3 −b1 = 16 and b5 −b3 = 144.

For a geometric series :

Ist term = a

Second term = ar

3rd term = ar^2

4th term = ar^3

5th term = ar^4 ;...

If b3 - b1 = 16;

ar^2 - a = 16

a(r^2 - 1) = 16 - - - (1)

b5 - b3 = 144

ar^4 - ar^2 = 144

ar^2(r^2 - 1) = 144 - - - - (2)

Divide (1) by (2)

a(r^2 - 1) / ar^2(r^2 - 1) = 16 /144

a / ar^2 = 1 / 9

ar^2 = 9a

Substitute for a in ar^2 - a = 16

9a - a = 16

8a = 16

a = 2

From ar^2 - a = 16

2r^2 - 2 = 16

2r^2 = 16 + 2

2r^2 = 18

r^2 = 18 / 2

r^2 = 9

r = √9

r = 3

Hence ;

a = b1 = 2 ; r = 3

7 0
3 years ago
Other questions:
  • ryan is going to make a sculpture from a rectangular block of clay. the volume of the block is (x+8)(x-3)(2x-5). A)the volume is
    14·1 answer
  • What is b for the equation y=1/3x+b??
    13·1 answer
  • The area of Brian’s rectangular garden, in square feet, can be found by using the expression 6(2x+5y). Use the distributive prop
    13·1 answer
  • Is the first side “WX and ZX” or “WX and XZ?”<br><br> This is sss congruence
    15·1 answer
  • Jackson is building a sandbox for his son. He needs to fill it with about 1 1 /2 feet of sand. If his sandbox is 4 feet by 2 fee
    8·1 answer
  • A bell tower casts a 60 cm shadow. At the same time a sculpture that is 4.5 meters tall casts a
    9·1 answer
  • Explanation needed <br>What is the x-intercept of the equation:<br> -5x+15y=30​
    7·1 answer
  • W(t) = -21 + 1; Find w(-7)
    10·1 answer
  • What could be<br> a good option available to you if you are<br> behind on loan payments?
    9·1 answer
  • The volume of a rectangular prism is 400 cm3 . If the length is 16 cm and the width is 5cm, what is its height? ​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!