THIS QUESTION IS SOLVED BY DOUBLE DIFFERENCE
8,12,18,27
DIFFERENCE NO. 1
12–8=4
18–12=6
27–18=9
DIFFERENCE NO. 2
6–4=2
9–6=3
FINALLY
4+9=13
13+27=40
ANSWER= 40
The correct answer for the given question is B. Heat is written as a reactant in the equation.
<h3>What is endothermic reaction?</h3>
An endothermic reaction is a reaction in which is reactants absorbs heat from the surrounding to give the product or heat supplied is the reactant.
Suppose if A and B are reactants that forms product C and D,
and H be the heat absorbed or supplies to the reactants.
Then for an endothermic reaction we can write-
A + B + Heat ---> C + D
Since, Heat is absorbed at the reactant side then it is called as endothermic reaction.
Hence,the correct answer for the given question is B. Heat is written as a reactant in the equation.
More about endothermic reaction:
brainly.com/question/23184814
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Answer:
(a) x² +2/3x -1/9 = 0
(b) 9x² +6x -1 = 0
Step-by-step explanation:
The product of quadratic factors can be expanded to give ...
(x -p)(x -q) = x² -(p+q)x +pq
Then the coefficients of x² +bx +c = 0 will be ...
b = -((-1-√2)/3 +(-1+√2)/3)) = 2/3
c = ((-1-√2)/3)·((-1+√2)/3) = (-1/3)² -(√2/3)²) = 1/9 -2/9 = -1/9
a) The quadratic with leading coefficient 1 is ...
x² +2/3x -1/9 = 0
__
b) Multiplying that by 9 gives ...
9x² +6x -1 = 0
Probably because people gave you the wrong answer. Not saying they did this intentionally....
Answer:
-200
Step-by-step explanation:
We are given that:
Simply insert this values into their correspondents in the equation given.
(-5 + (-15)) * (-5 - (-15))
Subtracting two negatives is like adding a positive and a negative.
(-5 + (-15)) * (-5 + 15)
Solve inside the parenthesis.
(-20) * (10)
Multiply.
-200
