Answer:
A) 1.5
B) x^2-23x+42 = (x-2)(x-21)
C) x=2, x=21
Step-by-step explanation:
a) 15 -2x / 3 = 4
15-2x = 12 (Times by three on both sides)
-2x = -3
x = -3/-2 = 3/2 = 1.5
b) x^2-23x+42
x^2-23x+42 = (x-2)(x-21)
c) x^2 -23x +42 = 0
x=2, x=21
(x-2) = 0 ⇒ x = 2
(x-21) = 0 ⇒ x = 21
B is the answer I know because I took the test
<em>A(a) = 24 cm²</em>
<em>A(b) = 40.04 cm² ≈ 40 cm²</em>
- <em>Step-by-step explanation:</em>
<em>Hi there ! </em>
<em>area formula (rectangle)</em>
<em>A = l × w</em>
<em>A(a) = 8cm × 3cm = 24 cm</em>
<em>A(b) = 5.2cm × 7.7cm = 40.04 cm² ≈ 40 cm²</em>
<em>Good luck !</em>
If the corresponding sides of two similar triangles have congruent angles than the sides correspond to each other
in triangle abc
and triangle def
ab:de
bc:ef
ca:fd
so they correspond in ratio but are not necessarily congruent
if in the similar triangles the sides are equal than the angles will correspond in ratio to add up to 180 degrees
so if triangle abc≈ triangle def
then
∠abc:∠def
∠bca:∠efd
∠cab:∠def
X=1/27 decimal form=0.037 repeating
