7x+5y= 19
-7x-2y=-16 add because its a negative
-----------------
3y=3
y=1
then you find x by placing 1 for y
7x+5(1)=19
7x=14
x=2
(2,1)
Answer:
A=8
B=6
C=14
Step-by-step explanation:
A+b+c=28
c+b=20
Substitute c+b for 20
A+20=28
A=28-20
A=8
c+a=22
Substitute a with 8
c+8=22
c=22-8
c=14
To get b, we substitute a with 8 and b with 14
A+b+c=28
8+b+14=28
22+b=28
b=28-22
b=6
Subtraction is the opposite of addition. eg. 9+5=14 but 14-5=9
She can expect $31.08 money for her upcoming 300-mile road trip.
<u>Step-by-step explanation:</u>
Given:
Kasha drove 135 miles for 5.4 gallons of gas.
For 300 mile road trip, kasha needs 'X' gallons of gas.
To find X,
Rate= miles/gas
135/5.4= 300/X
X= (300/135)/5.4
X= 2.2*5.4= 12 gallons
The cost per gallon= $2.59
The cost for 12 gallons= 12*2.59$= $31.08