Answer:
-84
Step-by-step explanation:
Let the number be x. Then we have,
(the quotient of a number and -7)
(decreased by 2)
(is 10)
Now we can solve for x,:
So, the original number is -84
Answer:
You are correct with B!!
Step-by-step explanation:
(x⁹)²
We have to multiply 9 x 2, regardless of the parenthesis for this one.
9 × 2 is 18.
We cannot simply 18 further.
Carry the x in front of 18.
x¹⁸
4=5x-3
<span>7=5x </span>
<span>7/5=x </span>
<span>1.4=x</span>
To find this you simply subtract 2 from 10 since it is given that the value of tom's card is 2 more than the value of liz's card, so liz's card has the number 8 on it.
hope this helps!
Answer:
The bacteria took 1 hour and 40 minutes to fill the first bottle and it took only 10 minutes to fill 3 more. This is because of the amount of bacteria, for the first bottle there were only a few so it took them time to grow and multiply but once there were a lot the process starts to get faster. Think of it like this if you have 1 bacteria it will multiply into 2 bacteria. The 2 will multiply into 4, then 8, 16, 32, 62, 124 and so on. Do you notice how the numbers are getting bigger every time? Each number is being multiplied by 2 so the growth rate speeds up very quickly, which is why it took the bacteria 1 hour and 40 minutes to fill the first bottle and only 10 minutes to fill the other 3.
(I'm not sure but this is my theory)