Answer:
B. Multiply the binomial by 3.
Step-by-step explanation:
We have been given an expression: . We are asked to determine the first step in simplifying the expression.
Since we know that the order of operations is also known as PEMDAS, where,
P= Parenthesis,
E= Exponents,
M= Multiplication,
D = Division,
A =Addition,
S = Subtraction.
According the order of operations we will distribute 3 to binomial or multiply the binomial by 3. Therefore, option B is the correct choice.
9514 1404 393
Explanation:
2a+7b=0 . . . . . . . . given [eq1]
3a−5b=31 . . . . . . . .given [eq2]
10a+35b=0 . . . . . . multiplication property of equality 5×[eq1] = [eq3]
21a−35b=217 . . . . .multiplication property of equality 7×[eq2] = [eq4]
31a = 217 . . . . . . . . addition/substitution properties of equality [eq3]+[eq4]
a = 7 . . . . . . . . . . . . division property of equality (÷31)
2(7)+7b=0 . . . . . . . .substitution property of equality; a=7 in [eq1]
14 + 7b = 0 . . . . . . . properties of real numbers
7b=−14 . . . . . . . . . . addition property of equality; add -14
b=−2 . . . . . . . . . . . . division property of equality (÷7)
Well when ever you're doing order of operations you always use please excuse my dear aunt sally please means parentheses ALWAYS GO FIRST Excuse means experience which if there's no parentheses exponents go first to my name is multiplication after parentheses multiplication always go first if there's no parentheses dear means division after multiplication comes division on means addition but pretty much after the multiplication parentheses and the division you complete the rest of the problem using the left to right method now the answer to this problem is
Y=x-1 eqn 1
y=-3x-5 eqn 2
subtracting 1 from 2 we get
0 = 4x + 4
hence x= -1
therefore y = -1-1 = -2
so (-1,-2 ) falls in III quad.