Answer:
x = 2/7
Step-by-step explanation:
Step 1: Write equation
20x + x - 2 = 4
Step 2: Solve for <em>x</em>
- <u>Combine like terms:</u> 21x - 2 = 4
- <u>Add 2 to both sides:</u> 21x = 6
- <u>Divide both sides by 21:</u> x = 6/21
- <u>Simplify:</u> x = 2/7
Step 3: Check
<em>Plug in x to verify it's a solution.</em>
20(2/7) + 2/7 - 2 = 4
40/7 + 2/7 - 2 = 4
42/7 - 2 = 4
6 - 2 = 4
4 = 4
Let us evaluate the given statements.
A, A number is divisible by 9 if and only is it ends in 3.
23/9 is not divisible.
FALSE
B. A quadrilateral is a square if and only if it has four right angles.
A rectangle is a quadrilateral with four right angles, but it is not a square.
FALSE
C. The sum of two integers is positive if and only if the two integers are
positive.
12 + (-10) = 2 (positive).
FALSE
D. A number is an even number if and only if it is divisible by 2.
Thi is true by definition.
TRUE
Answer: D
I really don’t understand it but can you do a little more explaining
Answer:
45.5
Step-by-step explanation:
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