Answer: y= 25+2.5x
Step-by-step explanation:
Let a = base pay , b = additional amount per newspaper.
Given: Last week, Pedro delivered 5 newspapers and earned $37.50.
i.e. 37.50=a+5b (i)
This week, he delivered 20 newspapers and earned $75.
i.e. 75=a+20b (ii)
Eliminate (i) from (ii)
37.50=15b
, i.e. additional amount per newspaper= $2.5
Put b= 2.5 in (i)
, i.e. base pay = $20
Let x= Number of newspapers Pedro delivers.
y= Earnings he receives in dollars.
y= 25+2.5x will be the required function.
42.7/7= 6.1
36.48/6=6.08
7.29/9=0.81
Answer:
x = 2√13
Step-by-step explanation:
First, we can put out a lot of equations to see if we can make a system:
<em>x² = y² + 4²</em>, x² + z² = 13², xz = 13y, <em>y² + 9² = z²</em>
Substitute 4 into 1: <em>x² = (z² - 9²) + 4²</em>
System 2 and substitution: <em>x² + z² = 169, x² - z² = -65</em>
Elimination: 2x² = 104
Divide: x² = 52
Square root: x = √52 = 2√13
Answer:
<h2>
y = x - 9x + 20</h2><h2 />
Step-by-step explanation:
As seen from the graph , the function cuts the x-axis at 4 and 5. So, the roots of function are 4 and 5.
The function becomes :
( x - 4 ) ( x - 5 )
Expanding:
So, after expansion , it becomes :
So, Option D is the correct option.
Hope this helps..
Best regards!!