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Mathematics

2 answers:

KiRa [710]3 years ago

6 0

Answer:

$\frac{1}{2} k + 2.5 = 7$

Step-by-step explanation:

$\frac{1}{2} (k + 5) = 7 \\ \frac{1}{2} k + 2.5 = 7$

Anestetic [448]3 years ago

6 0

Answer:

Step-by-step explanation:

1/2 times 5 is 2.5 and 1/2 times k is 1/2k

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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

ahrayia [7]

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.

3 0

3 years ago

Find the missing length <br> . Leave your answers in simplest radical form

Aloiza [94]

A^2 + B^2 = C^2

x^2 + 9^2 = (SQRT 226)^2

x^2 + 81 = 226

x^2 = 145

x = SQRT 145

8 0

3 years ago

How do you find the slope of x^2 at x = 5? please hurry