Answer:
493.15
Step-by-step explanation:
1 m = 100 cm....so 2.5 m = (2.5 * 100) = 250 cm
a = 1st shelf
b = 2nd
c = 3rd
d = 4th
a + b + c + d = 250
b = 2a + 18
c = a - 12
d = a + 4
a + (2a + 18) + (a - 12) + (a + 4) = 250
5a + 10 = 250
5a = 250 - 10
5a = 240
a = 240/5
a = 48 cm <== 1st shelf
b = 2a + 18 = 2(48) + 18 = 114 cm <== 2nd shelf
c = a - 12 = 48 - 12 = 36 cm <== 3rd shelf
d = a + 4 = 48 + 4 = 52 cm <== 4th shelf
so 2nd shelf is 114 cm
AB ≅ DC and AD ≅ BC
slope of BC = slope of AD (m = 1/3), slope of AB = slope of DC (m = 3/1)
opposite sides are congruent and parallel so ABCD is a parallelogram.
Answer: parallelogram
-28=-2x
Divide by negative 2
Your answer: x=14
Answer:7 5/12
Step-by-step explanation:
12 2/3 times 4 on both sides is become 8/12
3 1/4 times 3 on both sides is 3/12
12 8/12 minus 3 3/12 equals to 7 5/12
