The answer is -2x^2-16x+8
Answer:
The worth of one bill is $20 and the worth of the other bill is $1
Step-by-step explanation:
Let
x----> the worth of one bill
y ---> the worth of the other bill
I assume x > y
we know that
x+y=21 ----> equation A
x=y+19 ---> equation B
Solve the system by elimination
Multiply equation B by -1 both sides
-x=-y-19 ----> equation C
Adds equation A and equation C
x+y=21
-x=-y-19
------------
y=21-y-19
2y=2
y=1
Find the value of x
x=y+19 -----> x=1+19=20
therefore
The worth of one bill is $20 and the worth of the other bill is $1
The least miles per gallon this trip is 25 miles per gallon
<h3>How to determine the least miles per gallon?</h3>
The given parameters are:
Distance = 450 miles
Tank size = 18 gallons
The least miles per gallon this trip is calculated as:
Miles per gallon = Distance/Tank size
This gives
Miles per gallon = 450/18
Evaluate the quotient
Miles per gallon =25
Represent as an inequality
x >= 25
Hence, the least miles per gallon this trip is 25 miles per gallon
Read more about speed at:
brainly.com/question/4931057
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Answer:
x = -2
Step-by-step explanation:
-9x + 1 = -x + 17
To solve this equation
Note if there is more than one variable like x, y, or z
Also note the power of the variables, for example, x^2 or y^3
In this equation, there is only one variable which is x and it's also in the power of 1 ie x
Step 1 : rearrange according to like terms
-9x + x = 17 - 1
( don't forget that the sign always change on crossing an equals to, either + to - or - to +
-9x + x (also means 9 - 1 but only carries a negative sign)
= - 8x = 16
Dividing both sides by -8 to get the value of x
-8x / 8 = 16 /- 8
x = 16/ -8
x = -2
Answer:
-2/-3 = 2/3 this is true
Step-by-step explanatio
3/2 = 1,5 but -2/-3 = 2/3 about 0.66666...
