1) substitute 10x in for the equation.
Answer:
$7 200
Step-by-step explanation:
Amount of money paid for charity = 
× $22 000
= $2 200
Remaining money left for children = $22 000 - $2 200 - $10 800
= $9000
Let the amount of money her son receives be x and the amount her daughter gets be 4x.
Son's $ + Daughter's $ = $9000
x + 4x = 9000
5x = 9000
Amount of money her daughter gets (4x) = 
× 9000
= $7 200
Answer:
First we add 7 on both sides
-7x+3y= -6.3
+7. +7
___________
then we simply
-7x + 7x= -1
bring down the 3y
-6.3+ 7x = 0.23
So, -1x+3y=0.7
2y = 0.7
___ __
2. 2
y = 0.35 or 35!!
Step-by-step explanation:
Hope this helps
Answer:
Step-by-step explanation:
lets replace x with 3
f(3)= -2(3)^3+3(3+2)=-2*27+15=-54+15=-39
Answer:
Step-by-step explanation:
- The job can be completed by 7 people in 11 days
- The job is equivalent of 7*11 = 77 people*days
<u>After 3 days, job left:</u>
- (11 - 3)*7 = 56 people*days
This was completed by 7 - x people as x people left
<u>Time needed was 14 days, we have new equation:</u>
- 14(7 - x) = 56
- 7 - x = 4
- x = 7 - 4
- x = 3
As we found, 3 people left
