Answer:
1, 3, 4, and 10
Step-by-step explanation:
To get a y value, substitute the x value into the equation they gave you (y = 3x - 5). For the x value 2:
y = 3(2) - 5
y = 6 - 5
y = 1.
To get a missing x value, solve for x in the equation they gave you. You were given the y value, so you can substitute that into the equation.
(4) = 3x - 5
Add 5 to both sides
9 = 3x
Divide both sides by 3
3 = x
Do the same with 7
(7) = 3x - 5
Add 5
12 = 3x
Divide by 3
4 = x
For the last one, you're given x so substitute it into the equation:
y = 3(5) - 5
y = 15 - 5
y = 10
Answer:
D
Step-by-step explanation:
10×9×8×26×25=468000
True . In the ordered pair -4 is x while -12 is y. Now that you know this you can substitute the pair into the equations.
6×-4 is -24. -24 +12 equals -12. -12=6×-4+12. Same for the second one.
Answer:
(4,2 1/2)
Step-by-step explanation:
Uranium-235 is an isotope of uranium that is fissionable and appears naturally. His half-life is 713x10^6 years (703 million years). Therefore, half of Uranium 235 decayed into Lead-207 in 1 half-life. Based on this, we know that in 1 half-life there will be 50% of Uranium-235 and 50% of Lead-207, in two half-lives there will be 25% of Uranium-235 and 75% of Lead-207, finally, in three half-lives there will be 12.5% of Uranium-235 and 87.5% of Lead-207. Then, we have:
713x10^6 years x 3 half-lives = 2139x10^6 years= 2.139 billion years.
H<span>ow old is the rock?
</span>
The answer is: 2.139 billion years
