Answer:
See Below
Step-by-step explanation:
If DF = 42, What is DE?
D__________E_______F
(7x + 1) + ( 4x-3) = 42
7x+1+ 4x -3 = 42 Solve for x
11x -2 = 42
+2 +2
11x = 44
11x / 11 = 44/ 11
x = 4
Now plug x in for the equation of DE
7x+1
7(4) + 1
28 + 1 = 29
DE = 19
Answer:
x=68
y=112
Step-by-step explanation:
x+52+60=180 (interior angle of a triangle)
x+112=180
x=180-112
x=68
x+y=180
68+y=180
y=112
D = rt
130ft = r(26sec)
130/26 = r
5=r
Answer:
B and E
Step-by-step explanation:
anything with a 90 degree angle has a perpendicular side, which basically means anything with a completely straight corner. acute and equilateral triangles dont count because they have pointed angles.