Answer:
The woman bought 2 items at $12 each.
Step-by-step explanation:
Given that a woman bought a number of items for $ 24, and she realized that if she had bought 4 more items for the same money, she would have paid $ 8 less per item, to determine how many Items did she buy the following calculation must be done:
X = 24
X + 4 = 24
24/2 = 12
24/6 = 4
12 - 4 = 8
Therefore, the woman bought 2 items.
Answer:
Let the number of five's = 2x = 2x × 5 = 10x
Then the number of ten's = x = x × 10 = 10x
10x + 10x = 640
20x = 640
x = 32
There are 32 ten dollar bills.
Answer:
90
Step-by-step explanation:
That's an odd way to represent 3.
1 day means 3 tablets are taken
30 days means that 3*30 tablets = 90 tablets
Answer:
( , 8 )
Step-by-step explanation:
y = 8x + 6 → (1)
y = 32x → (2)
substitute y = 32x into (1)
32x = 8x + 6 ( subtract 8x from both sides )
24x = 6 ( divide both sides by 24 )
x = =
substitute this value into either of the 2 equations and solve for y
substituting into (2)
y = 32 × = 8
solution is ( , 8 )
To solve this question, we need to solve an exponential equation, which we do applying the natural logarithm to both sides of the equation, getting that it will take 7.6 years for for 21 of the trees to become infected.
Model:
The exponential model for the number of infected trees after t years is given by:
How many years will it take for 21 of the trees to become infected?
This is t for which:
Thus
Applying the natural logarithm to both sides:
It will take 7.6 years for for 21 of the trees to become infected.
For another example of a problem in which an exponential equation is solved, you can check brainly.com/question/24290183.