Answer:
<h2> x =
-5 - √15 or x = -5 + √15</h2>
Step-by-step explanation:

Answer: -1.6 is not a possible r-value.
Step-by-step explanation:
R-values range from -1 to +1. Out of all these numbers, -1.6 does not belong. Hence, -1.6 is not a r-value.
Answer:
491.4 litres
Step-by-step explanation:
(5.4×13)×7 = 491.4
Convince yourself that there are 3 similar triangles in the diagram. Choose the
similarity statement that represents the relationship among the 3 triangles.