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A) 6x – 6 = 15x + 15
B) 6x – 15 = 6x +15
C) 6x – 6 = 6x + 15
D) 6x + 15 = 6x + 15
By assessing each equation, we deduce that the only equation that has exactly one solution among the ones given is equation A (6x – 6 = 15x + 15). Equations B (6x – 15 = 6x +15) and C (6x – 6 = 6x + 15) have no solutions, and equation D (6x + 15 = 6x + 15) has infinitely many solutions.
Solution to an equation is the value of variable that satisfies the equation or makes the equation true. Let's examine the given equations one by one:
A) 6x – 6 = 15x + 15: If we simplify this equation by moving all the terms involving x to one side and the constants to the other, we get: 9x = -21, which gives x = -21/9 or -7/3, hence this equation has exactly one solution .
B) 6x – 15 = 6x +15: In this case, if we subtract 6x from both sides, we get -15 = 15, which is not true, hence this equation has no solution.
C) 6x – 6 = 6x + 15: Again, if we subtract 6x from both sides, we get -6 = 15, which is not true, hence this equation again has no solution.
D) 6x + 15 = 6x + 15: For this equation, it stands true for any value of x, therefore this equation has infinitely many solutions.
So, out of the given options, only the equation A has exactly one solution.
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8 ; 2,2622 g
8 ; 4.75 g
8 ; 0.15 g
Answer:
D. 8; 0.15 g
Step-by-step explanation:
We have been given that a a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days.
To find the half-lives of polonium-210, we will divide 1104 by 138.
Therefore, there are 8 half-lives will occur in 1104 days.
Therefore, 0.15 gm of the polonium will be left after 1104 days.
¹/₄ part or 3.725 kilograms
Given:
An artist builds a sculpture out of metal and wood that weighs 14.9 kilograms,
Question:
How much does the wood part of the sculpture weighs?
The Process:
From the information above, we make a diagram that matches the composition of the sculpture material.
And now, let us calculate the wood part of the sculpture weighs.
Both 4 and 14.9 are multiplied by 10.
Both the numerator and denominator are divided by 4.
Thus, the wood part of the sculpture weighs is 3.725 kilograms or ¹/₄ part.
Keywords: an artist, builds a sculpture, out of metal and wood, that weighs 14.9 kilograms, 3/4, metal, the rest is wood, how much, the wood part, of the sculpture weighs