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ivanzaharov [21]
3 years ago
6

I WILL GIVE BRAINLIEST, PLZ ANSWER,Olivia walked 2 2/5 km in 2/3 hour while Ryan walked 4 1/2 km in 1 1/ 2 hours. Who walked fas

ter and how much faster?
Mathematics
2 answers:
makvit [3.9K]3 years ago
6 0
Olivia walked faster. She walked 2/4km fastwr
nevsk [136]3 years ago
5 0
Ryan walked faster. He ended up walking 2 1/10 km faster than Olivia.
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Please answer with clear instructions so that i can apply this to other questions.
kvv77 [185]

Answer:

10 terms

Step-by-step explanation:

equate the sum formula to 55 and solve for n

\frac{1}{2} n(n + 1) = 55 ( multiply both sides by 2 to clear the fraction )

n(n + 1) = 110 ← distribute parenthesis on left side

n² + n = 110 ( subtract 110 from both sides )

n² + n - 110 = 0 ← in standard form

Consider the factors of the constant term (- 110) which sum to give the coefficient of the n- term (+ 1)

the factors are + 11 and - 10 , since

11 × - 10 = - 110 and 11 - 10 = + 1 , then

(n + 11)(n - 10) = 0 ← in factored form

equate each factor to zero and solve for n

n + 11 = 0 ⇒ n = - 11

n - 10 = 0 ⇒ n = 10

However, n > 0 , then n = 10

number of terms which sum to 55 is 10

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Step-by-step explanation:

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