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
vredina [299]
3 years ago
15

A chemical reaction is endothermic if it absorbs heat from its surroundings. It is exothermic if it gives off heat to its surrou

ndings. In her chemistry class, Lily is given a salt (ammonium nitrate) and a beaker of water at 60 ∘F. She dissolves the salt in the water and sees that the temperature of the solution is now 50 ∘F. Did the temperature of the solution go up or go down? By how many degrees? What kind of reaction has occurred?
Mathematics
1 answer:
Crazy boy [7]3 years ago
4 0

The temperature went down by 10 degrees F. An exothermic reaction happened because the temperature went down so heat was released.

You might be interested in
what is the quotient (65y3 15y2 − 25y) ÷ 5y? a. 13y2 3y − 5 b. 13y3 3y2 − 5y c. 13y2 − 3y 5 d.13y2 − 3y − 5
Aneli [31]

Keywords:

<em>Division, quotient, polynomial, monomial </em>

For this case we must solve a division between a polynomial and a monomial and indicate which is the quotient.

By definition, if we have a division of the form: \frac {a} {b} = c, the quotient is given by "c".

We have the following polynomial:

65y ^ 3 + 15y ^ 2 - 25y that must be divided between monomy5y, then:

C (y) represents the quotient of the division:

C (y) = \frac {65y ^ 3 + 15y ^ 2 - 25y} {5y}

C (y) = \frac {65y ^ 3} {5y} + \frac {15y ^ 2} {5y} - \frac {25y} {5y}

C (y) = 13y ^ 2 + 3y-5

Thus, the quotient of the division between the polynomial and the monomial is given by:

C (y) = 13y ^ 2 + 3y-5

Answer:

The quotient is: C (y) = 13y ^ 2 + 3y-5

Option: A


4 0
3 years ago
Read 2 more answers
PLEASE HELP FOR A BRAINLIEST!!!! Create your own example and explain how to solve Quadratic Equation using Quadratic Formula. Wh
SVETLANKA909090 [29]

Step-by-step explanation:

1. Create your own example and explain how to solve Quadratic Equation using Quadratic Formula.

The quadratic formula is used to solve quadratic equations. It is shown as   x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

A quadratic equation is generally shown in the form of ax^{2} +bx + c = 0

For example, if you saw the equation  7x^{2} + 3x + 20 = 0

7 would be a, 3 would be b, and 20 would be c.

To solve the equation above, you would fill in the quadratic formula as such, x=\dfrac{-3\pm\sqrt{(3)^2-4(7)(20)}}{2(7)}

Then you could solve for x.

2. What part in the Quadratic Formula is the discriminant?

The discriminant is the equation under the square root on the quadratic formula, b^{2} - 4ac

It is tells us whether there are two solutions, one solutions, or no solutions.

3.  How do you know the number of solutions based on the value of the discriminant?

To know the number of solutions based off of the value of the discriminant, you need to plug in your values. Using the example quadratic equation, 7x^{2} + 3x + 20 = 0

We will plug the values into the discriminant.

3^{2} - 4(7)(20) = -551

Now, if the discriminant is positive it has two real solutions. If the discriminant is zero the equation has no real-number solutions. And finally, if the discriminant is negative, the equation has one real solution. Because our discriminant is -551, the example equation has one real solution.

Hope this helps! (Please consider Brainliest)

8 0
3 years ago
Please answer if you can.
Mumz [18]

Answer:

25+24= 49coins 49÷2.5 is 19.5 so there are 19.5 dimes in the bag I believe

7 0
3 years ago
Which relation is a function.
GREYUIT [131]

Answer:

its B

Step-by-step explanation:

I just did it

7 0
3 years ago
Which of these is part of the circumference of a circle? Center, arc, area, sector
IrinaK [193]

Answer:

Arc

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • How do u spell 5,165,874 in word form
    11·2 answers
  • What is the simplified form of 7(5x-6)
    12·2 answers
  • Multiply :-4 4\2 •2 6\5 and write the result in simplest form.....
    9·1 answer
  • What is (4y) to the second power when y =-5
    12·1 answer
  • 8.45x10^-2 in standard form?
    5·2 answers
  • Which is equivalent to 1/4x <br><br> A.1/8x+1/8x<br> B.1/8x+1/8<br> C.1/8+1/8<br> D.1/2x+1/2x
    6·1 answer
  • Solution to m^2- 36=0
    12·1 answer
  • If it takes 4 years for an animal population to double, how many years will it take until the population triples?
    5·2 answers
  • Real world examples of:<br> -scalene triangle<br> -isosceles triangle<br> -perpendicular lines
    10·1 answer
  • 40% of the students passed both exams. 80% of the students passed the second exam. how many students (in percent) who passed the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!