Help text math XD thank you

14 deliveries

Step-by-step explanation:

First we have to find out how much he makes in a day aside from what he makes a day aside from his deliveries, so 9 x 8 = 72. Then we take 155 - 72 = 83. Then since he wants to make more than 155, we'll add one to 83, then take that divided by 6.  84/6=14. So he'd have to make at least 14 deliveries to make $156 in a day.

D. 14

Step-by-step explanation:

Write the expression (explanation)

9 per hour= 9xh= 9h

and= addition

6 each delivery= 6xd=6d

more than= >

Final expression you need to solve

9h+6d>155

how many hours?: 8 hours

9(8)+6d>155

solve for d

72+6d>155

6d>83

d>~13.83

He cannot make less than 13.83, so you would round it up to 14.

a.   we have two

lines:   y = 4-x   and  

y = 8-x^-1

given two simultaneous equations that are both to be

true, then the solution is the points where the lines cross. the intersection is

where the two equations are equal. therefore the solution that works for both

equations is when

4-x = 8-x^-1

this is where the two lines will cross and that is the

common point that satisfies both equations.

b.   4-x = 8-x^-1

  x           4-x       8-x^-1

-3           7        

8.33

-2           6         8.5

-1           5         9

  0           4        

-

  1           3        

7

  2           2        

7.5

  3           1         7.67

the table shows that none of the x values from -3 to 3 is

the solution because in no case does

4-x = 8-x^-1

to find the solution we need to rearrange the equation to

find for x:

4-x = 8-x^-1

multiply both sides with x:

4x-x^2 = 8x-1

x^2+4x-1=0

x= -4.236, 0.236

therefore there are two points that satisfies the

equation.

find y:  

x=-4.236

y = 4-x   = 4 – (-4.236)

= 8.236

y = 8-x^-1 =   .236)^-1

= 8.236

x=0.236

  y = 4-x   = 4 – (0.236) = 3.764

y = 8-x^-1 =   8-(0.236)^-1

= 3.764

thus the two lines cross at 2 points:

(-4.236, 8.236) & (0.236, 3.764)

c.   to solve

graphically the equation 4-x = 8-x^-1

we would graph both lines: y = 4-x   and   y

= 8-x^-1

the point on the graph where the lines cross is the

solution to the system of equations.

just graph the points on part b on a cartesian coordinate

system and extend the two lines.   the

solution is, as stated, the point where the two lines cross on the graph.

step-by-step explanation:

mark brainliest!

just sum

10 + 10 = 20