Four expressions are shown below:

4(8x + 2)
4(7x + 3)
32x + 8
28x + 12

which two expressions are equivalent to 4(7x + 2 + x)?
1. a and b
2. b and c
3.a and d
4. a and c

The correct answer is number 4.

Step-by-step explanation: First, solve the (). 7x + x or 7x + 1x = 8x. Now, you have 4(8x + 2). That would be the first choice, A. But what about the second one? Well, 4 x 8x would be 32x, and 4 x 2 would be 8. Now put that together. 32x + 8. Is there an expression like that? Yes, there is. Choice C. Now that means choice A and C are equivalent to 4(7x + 2 + x). Only number 4 holds those choices, so your answer would be number 4. Hope this helped! :)

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

step-by-step explanation:

divide, then simplify your answer.

1. make -15.66 ÷   5.8 a fraction. then divide.

2. simplify.  

3. final answer.