Answer:
Step-by-step explanation:
Since both equations have 
, we can subtract the second equation from the first to try and solve for 
:
With this, we can plug the value back into the first equation to solve for 
:
Therefore, the solution is 
Answer:
y = 
x
Step-by-step explanation:
The equation of a linear pattern has the form
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = 
with (x₁, y₁ ) = (1, ) and (x₂, y₂ ) = (2, 1) ← 2 ordered pairs from the table
m = 
= , thus
y = x + c ← is the partial equation
To find c use any ordered pair from the table and substitute into the partial equation.
Using (2, 1) , then
1 = 1 + c ⇒ c = 1 - 1 = 0
y = x + 0 ← equation for pattern or quite simply
y = x
Wow ! Now THERE's an incentive ! I'm just glad I got in
early enough so that there's an answer block left open.
If you should happen to glance at these three problems,
you'll notice that they're all the same problem, just with
different numbers. So if somebody showed you how to do
ONE of them, you'd know how to do ALL of them.
1). Markup = 10% of $50 = 0.1 x $50 = $5
Selling price = ($50 + $5) = $55 .
2). Markup = 60% of $80 = 0.6 x $80 = $48
Selling price = ($80 + $48) = $128 .
3). Markup = 25% of $140 = 0.25 x $140 = $35
Selling price = ($140 + $35) = $175 .
Answer:
(a) 0.023%
Step-by-step explanation:
Fill in the given number and do the arithmetic.
A(12) = 0.23·12·e^(-0.4·12) ≈ 0.0227 ≈ 0.023
The percentage of alcohol in the blood 12 hours after the drink is about 0.023.
9514 1404 393
Answer:
15.8 ÷ 3.9
Step-by-step explanation:
To make up this problem, we can start with two numbers whose quotient we know is 4, such as 16 and 4. Then we can choose two numbers that round to these values, such as 15.8 and 3.9
__
The problem 15.8 ÷ 3.9 has an estimated quotient of 4. The estimate is found by rounding each value to the nearest integer and finding the quotient of those numbers: 16/4 = 4.
_____
<em>Additional comment</em>
The actual quotient is 4 2/39, about 4.05128.
