Homework 2modules 2 & 3problem 1 - use the aci code provisions to popolulate the chart below. keep this handy as a resourceonce complete. i will upload excel file so you do not need to recreate, should be quick! i just want youall to get familiar with looking into aci and the nomenclature. notesconcrete strength7,000 psi | 8,000 psi5,000 psi6,000 psi9,000 psi 10,000 psiestimate strength of concrete based on 5 day strength (make time and input)aci 18.4.1c-note, when not at ends of simply supported members 2 - for a .5" low lax prestressing tendon 80ft in length, if we take the prestressing initially to250 ksi, how much longer will the tendon be from its oringal length (in inches)? (not all informationgiven is needed, this is just to get a sense of how much strain is in a typical tendon to prestress it).(hint - one line answer! )problem 3 - consider the use of 150 ksi reinforcing steel, as shown in the video presentation, sketchs an equivalent value of the reduciton factor (phi) relative to represent the same

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

pls mark as brainliest

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!

answer: i wpould go with c

step-by-step explanation:

answer: 3.26019516

step-by-step explanation: