Part (a)
![z=\frac{85-75}{11.4} \approx \boxed{0.88}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B85-75%7D%7B11.4%7D%20%5Capprox%20%5Cboxed%7B0.88%7D)
By similar logic, the answers to the other parts are
(b) 1.75
(c) -2.19
(d) 0
What it is basically asking is if Y = -4, find the value of x in the equation 6x + 7y = 4x + 4y
To solve this you just need to plug in -4 for y and solve for x
6x + 7(-4) = 4x + 4(-4)
6x - 28 = 4x - 16
Now isolate x by adding 28 to both sides
6x - 28 + 28 = 4x - 16 + 28
6x = 4x + 8
and subtract 4x from both sides
6x - 4x = 4x - 4x + 8
2x = 8
divide both sides by 2
2/2x = 8/2
x = 4
x = 4, y = -2
Answer: (4, - 2)
Hope it helps :)
Bransliest would be appreciated
5/4 divided by 7/16 is 20/7 or 2.857142 and the numbers behind the 2. are infinity unless you mean 7/16 divided by 5/4 which is 0.35 or 7/20
The equations y = 3x - 4 and y = 3x + 1 are linear equations
The equations have no solution
<h3>How to determine the solution of the equations?</h3>
The equations are given as:
y = 3x - 4
y = 3x + 1
Next, we plot the graph of the equations y = 3x - 4 and y = 3x + 1
From the graph (see attachment), we can see that the equations do not have a point of intersection
Hence, the equations has no solution
Read more about linear equations at:
brainly.com/question/14323743