Answer:
D
Step-by-step explanation:
The solution is B. In each equation, it uses parenthesis to group operations. On the left, each pair repeats one number either 1.6 and 4.2. On the right is written the reduced form by writing the expression with a greatest common factor.
Option A is incorrect since 1.6 is not the GCF which appears in each parenthesis.
Option B is incorrect because the operation in the parenthesis is multiplication and not addition.
Option C is incorrect because 1.6 as a GCF is applied using multiplication.
Option D is correct since 1.6 does occur as a GCF in each parenthesis. It also has written correctly (4.2 +7) since addition is the operation between the parenthesis.
Answer:
Step-by-step explanation:
Givens
x + y = 2
x - y = 6
Solution
Just add the two equations together. The y's will drop out.
x + y = 2
<u>x - y = 6 </u> Add
2x = 8 Divide by 2
2x/2 = 8/2 Combine
x = 4 Substitute x = 4 into the top equation
x + y = 2
4 + y = 2 Subtract 4 from both sides
4-4+y=2-4 Combine
y = - 2
Answer
x = 4
y = -2
Answer: The correct answer is: " 3 " .
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Step-by-step explanation:
_______________________________
The problem given is:
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Evaluate: log 2 base 8 .
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Rewrite as: " 
" ;
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Take note of the following definition of a logarithm:
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" 
" ; ↔ " 
" ;
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in which: 
refers to the "base" ;
refers to the "argument" ;
refers to the "exponent" ;
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As such:
" "
⇔ " 
" ; Solve for "x" ;
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Note:
2⁰ = 1 ;
2¹ = 2 ;
2² = 2 * 2 = 4 ;
2³ = 2 * 2 * 2 = 8 .
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→ " " ;
→ " 
" ; since: " 
" ;
→ as such: " x = 3 " ;
______________________
Thus:
"log 2 base 8 " ;
= 
.
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Hope this helps!
Best wishes to you!
4x + 30 = 5x + 20
30 - 20 = 5x - 4x
10 = x <==
