Say X is 5 and 5+4 is 9. X is still 5 then 5-2 would be 3
Answer:
C
Step-by-step explanation:
6−13
=6−13
=6+−13
=−7
5x + 18 = 153
We have x representing the price of the paperback novels, okay? Then we've got 4x, representing the amount spent on clothes, because she spent 4 times as much on clothes then on paperbacks. Next, we have 18, because of the additional $18 spent on the DVD. Finally, we set the equation equal to 153, because Natalia spent $153 total.
So we've got x + 4x + 18 = 183.
Combine like terms.
x + 4x = 5x.
Now our final equation is 5x + 18 = 153.
For the second part, we'll just solve for x in this simple two step equation.
5x + 18 = 153
Subtract 18 from both sides
5x + 18 = 153
<span>- 18 - 18
</span>5x = 135
Divide both sides by 5 to isolate the variable.
5x<span> / 5</span> = 135 <span>/ 5
</span>x = 27
We can check this by substituting our solution back into our equation. We do that by replacing the variable x with 27.
5x + 18 = 153
5(27) + 18 = 153
135 + 18 = 153
153 = 153
So our solution is correct!
The equation is '5x + 18 = 135'
Natalia spent $27 on paperbacks.
Hope this helps!!
Let me know if you need help understanding anything and I'll try to explain the best I can.
Answer:
y = -6
Step-by-step explanation:
-2y+2 = -2(3y+11)
-2y+2 = -6y - 22
4y +2 = -22
4y = -24
y = -6
We can model the following exponential growth:
Where x represents the time and y the number of transistors.
We're asked to find y such that x=8. For this, we just replace:
Therefore, 9,467,599 transistors could fit into a microchip 8 years later.