1. 0.87 is the same as 87/100
87/100
2(x + 3) = x - 4
distribute
2x + 6 = x - 4
either subtract 6 from both sides or add 4. i will be subtracting 6.
2x = x - 10
subtract x from both sides
x = -10
Because the only difference between them is size so the basic form of the shape remains, having corresponding sides in proportion.
<h2>Explanation:</h2>
Two triangles are similar if the only difference between them is size. Put another way, the basic form of the shape remains. If this is true, then:
- Corresponding angles are congruent
- Corresponding sides are in proportion
Since you didn't provide any graph, I have attached two similar triangles below. As you can see they are right triangles. As we said, corresponding sides of similar triangles are in proportion, so it is true that:

<h2>Learn more:</h2>
Right and scalene triangles: brainly.com/question/10379190
#LearnWithBrainly
Answer:
The width is 20 ft and the length is 80 ft
Step-by-step explanation:
Area = l * w
l = w +60
SA = 1600 ft^2 ( which is the regular area) The surface area of the water is just what is on top which is length times width
1600 = l*w
Substitute in l = w+60
1600 = (w+60) *w
Distribute the w
1600 = w^2 +60w
Subtract 1600 from each side
1600-1600 = w^2 + 60w -1600
0 = w^2 + 60w -1600
Factor
0=(w-20) (w+80)
Using the zero product property
w-20=0 w+80 =0
w=20 or w=-80
The width cannot be negative so
w=20
Now we need to find the length
l = w+60
l = 60+20
l =80