I don’t understand, translate it in English and I can help:)
They are parallel when the slopes are the same
example:
y=2x+3
y=2x-5
Answer:

Step-by-step explanation:
Each shape is 1 whole.
In the given image, there are 4 parts in each shape.
The shaded part in the first shape is 4.
The fraction of the shaded part in the first shape

The shaded part in the second shape is 4.
The fraction of the shaded part in the second shape

The shaded part of the model 

Hence, the fraction represented by the shaded part of the model is
.
Roger finished first.
2 2/3 is equal to 2 4/6. And then 2 and 4/6 is less than 2 and 5/6.
Answer:
A: 779 cm²
B: 1837 cm²
Step-by-step explanation:
For both problems, use the formula for surface area of a cylinder:
SA = 2πr² + 2πrh
2πr² is the two bases.
2πrh is the curved surface.
<u>PROBLEM A</u>
"the cylinder is 60 cm long" is h = 60.
If given diameter, you can find "r" by dividing it by 2. d = 2r
Given d = 4, then r = 2.
SA = 2πr² + 2πrh
SA = 2π2² + 2π2(60)
SA = 8π + 240π Add
SA = 248π Exact answer
SA ≈ 779.114978 Answer on calculator
SA ≈ 779 Rounded answer
Remember to include the units.
The surface area is about 779 cm².
<u>PROBLEM B</u>
"80 cm long" h = 80.
"circumference of 22 cm". C = 22. Remember C = 2πr. Find "r".
C = 2πr
22 = 2πr
11 = πr
r ≈ 11/π
SA = 2πr² + 2πrh
SA = 2π(11/π)² + 22(80) Substitute 2πr with the circumference.
SA ≈ 1837.030992 Answer on calculator
SA ≈ 1837 Rounded answer
Remember to include the units.
The surface area is about 1837 cm².