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jarptica [38.1K]
3 years ago
10

PLS help me with these 2 questions THANK YOU!

Mathematics
1 answer:
timofeeve [1]3 years ago
3 0
Qustion 1 is C, Question 2 is false
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For f(x) = 5x - 7, find f(-3).
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Answer:

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Step-by-step explanation:

f(x) = 5x -7

substitute x = -3 into the equation as follows:

f(-3) = 5( -3) -7

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= -22

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4 years ago
Simplify the expression. Write the answer using scientific notation. (7 × 105)2 a. 4.9 × 1010 b. 4.9 × 1011 c. 4.9 × 109 d. 49 ×
nataly862011 [7]

Answer:

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Step-by-step explanation:

Using scientific notation is similar to expressing in standard form. Given that (7 × 105)2

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= 49 × 10¹⁰

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Hence the expression becomes

= 4.9 × 10 × 10¹⁰

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= 4.9 ×  10¹¹ in scientific notation

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