We know that
<span>a) the slope-intercept form of the line---------------> y=mx+b
b) </span><span>if two lines are parallel both have the same slope
</span>then
<span>passes through the point (1,0) and is parallel to x-y=7
Step 1
Find the slope
</span>x-y=7------------> y=x-7------------> m=1
Step 2
Find the slope-intercept form of the line---> y=mx+b
point (1,0) m=1
0=(1)*(1)+b------> b=-1
y=(1)*x-1--------> y=x-1
the answer is
y=x-1
using a graph tool
see the attached figure
<span> 3/4-4z+5/4z-1/2+1/2z </span>Final result : 1 - 9z
——————
4
Step by step solution :<span>Step 1 :</span> 1
Simplify —
2
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<span>Equation at the end of step 1 :</span> 3 5 1 1
(((—-4z)+(—•z))-—)+(—•z)
4 4 2 2
<span>Step 2 :</span> 1
Simplify —
2
<span>Equation at the end of step 2 :</span> 3 5 1 z
(((—-4z)+(—•z))-—)+—
4 4 2 2
<span>Step 3 :</span> 5
Simplify —
4
<span>Equation at the end of step 3 :</span> 3 5 1 z
(((—-4z)+(—•z))-—)+—
4 4 2 2
<span>Step 4 :</span> 3
Simplify —
4
<span>Equation at the end of step 4 :</span> 3 5z 1 z
(((— - 4z) + ——) - —) + —
4 4 2 2
<span>Step 5 :</span>Rewriting the whole as an Equivalent Fraction :
<span> 5.1 </span> Subtracting a whole from a fraction
Rewrite the whole as a fraction using <span> 4 </span> as the denominator :
<span> 4z 4z • 4
4z = —— = ——————
1 4 </span>
Well nine times 199 is 1,791but im not sure if thats what its asking
Answer:
4 hours
Step-by-step explanation:

21 · y = 3 · 28
21y = 84
21y ÷ 21 = 84 ÷ 21
y = 4