1. For the three-part question that follows, provide your answer to each question in the given workspace. Identify
1 answer:
Answer: a) 6 b) 11.53 c) the smallest number of significant digits is 4
<u>Step-by-step explanation:</u>
a)
Complete the subtraction and addition (you can do this manually by lining up the decimal ... or... using a calculator)
2.784 - 3.00079 + 10.671 + 1.0798 = 11.5340
→ there are 6 digits in the answer
b & c)
2.784 has 4 significant digits
3.00079 has 6 significant digits
10.671 has 5 significant digits
1.0798 has 5 significant digits
→ the smallest number of significant digits is 4 so round the answer from part a to 4 significant digits:
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Answer:
x =
Step-by-step explanation:
Given
-
=
← factor denominator
-
=
[ x ≠ 0, x ≠ - 1 as these would make the terms undefined ]
Multiply through by x(x + 1)
4x² - 5(x + 1) = 4
4x² - 5x - 4 = 4 ( subtract 4 from both sides )
4x² - 5x - 9 = 0 ← in standard form
(x + 1)(4x - 9) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 1 = 0 ⇒ x = - 1
4x - 9 = 0 ⇒ 4x = 9 ⇒ x =
However, x ≠ - 1 for reason given above, then
solution is x =