3 years ago

Need Help Quickly - conjectures with angles

Mathematics

1 answer:

Ksenya-84 [330]3 years ago

3 0

a) false (89+89=178⁰ not acute!)

b) false (they could both be 90⁰ but this is the only angle that works)

c) what

d) false (92+92=184⁰ this is less than 360⁰)

can you please explain c ????

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Jack and Jim went biking. Jack biked for 5 1/3 hours with average speed 12 1/2 miles per hour. Jim traveled exactly 1 1/5 as far

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Given that Jack biked for $5 \frac{1}{3}$ hours with an average speed of $12 \frac{1}{2}$ miles per hour.

The distance travelled by Jack is given by

$d=speed\times time \\ \\ =12 \frac{1}{2}\times5 \frac{1}{3}= \frac{25}{2} \times \frac{16}{3} \\ \\ = \frac{200}{3} =66 \frac{2}{3} \ miles$

Given that Jim travelled exactly $1 \frac{1}{5}$ as far as Jack did, then the distance Jim travelled is given by

$d=1 \frac{1}{5} \times66 \frac{2}{3} \\ \\ = \frac{6}{5} \times \frac{200}{3} =80$

Therefore, the length of Jim's journey is 80 miles.

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3 years ago

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kobusy [5.1K]

Answer: 10. Answer is -3

Step-by-step explanation: