Answer: 8
Step-by-step explanation:
In order to solve this, you have to set up a systems of linear equations.
Let's say that children = c and adults = a
30a + 12c = 19,080
a + c = 960
I'm going to show you how to solve this system of linear equations by substitution, the easiest way to solve in my opinion.
a + c = 960
- c - c
---------------------- ⇒ Step 1: Solve for either a or c in either equation.
a = 960 - c
20(960 - c)+ 12c = 19,080
19,200 - 20c + 12c = 19,080
19,200 - 8c = 19,080
- 19,200 - 19,200
---------------------------------- ⇒ Step 2: Substitute in the value you got for a or c
8c = -120 into the opposite equation.
------ ---------
8 8
c = -15
30a + 12(-15) = 19,080
30a - 180 = 19,080
+ 180 + 180
-------------------------------
30a = 19,260
------- -----------
30 30
a = 642
__________________________________________________________
I just realized that there can't be a negative amount of children, so I'm sorry if these results are all wrong.
To begin, each of the friends have made 4 bags of dough. This gives 12 bags at the outset. After 10 days, all 12 bags are made into (4*12) bags, or 48 bags. After 20 days, the 48 bags are made into (48*4), or the required 192 bags. After 20 days, then, the friends have the needed 192 bags.
Read more on Brainly.com - brainly.com/question/728837#readmore
Answer:
The rate of this account corresponds to a increse of 25%.(Option 4)
Step-by-step explanation:
To find out the increase/decrease rate, first we need to re express the exponential term:
V=750*(0.80)^-x
By applying the respectives properties we can express the exponent of the equation as follows:
(0.80)^-x = 1/(0.8^x) = (1^x)/(0.8^x) = (1/0.8)^x = 1.25^x
Then the Kalani's stock investments can be written as:
V=750*1.25^x
Then the above equation can be expressed as:
V=750*(1+0.25)^x
Where 0.25 represents a increment rate of 25%