15-6.9=8.1
8.1 x 3.9= 31.59
$31.59 is your answer
hope this helps :)
Step-by-step explanation:
F(2)=3(2)²-7
=5
................
Answer:
y=x-7
Step-by-step explanation:
y=mx+b
b=y-intercept
m=Constant
x= variable x
Slope=0/2 so=0
take away the zero and leave the x write your equation
y=x-7
X+y=70
x=2y-5
x=larger number
y=smaller number
now plug in the value of x to only have one variable in the equation...
Way to solve for y:
(2y-5)+y=70
3y-5=70
add 5 on both sides...
3y=75
divide by 3 on both sides
y=25
1st way to solve for x:
now plug in y in the original equation...
x+25=70
subtract 25 on both sides...
x=45
2nd way to solve for x:
plug in y for the second equation...
x=25(2)-5
x=50-5
x=45
answer: the two numbers are 45 and 25.
The ratio is 1 to 3. Hope this helped
