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Mashutka [201]
3 years ago
10

PLEASE ANSWER picture shown

Mathematics
1 answer:
Alexxx [7]3 years ago
5 0
\frac{x}{2} + \frac{7}{9x}
= \frac{x*9x}{2*9x} + \frac{7*2}{9x*2}
= \frac{9x^2}{18x} + \frac{14}{18x}
= \frac{9x^2+14}{18x}

Therefore the answer is B.

Hope this helps !

Photon
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80%


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Step-by-step explanation:

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Mark is 15 years younger than Ashley. The sum of their ages is 55. Write a set of equations to determine Mark (M) age and Ashley
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4 0
3 years ago
Physics
Andrej [43]

Answer:

a) Josef jogging from A to B;

i. speed = 2 m/s

ii. velocity = 2m/s

a) a) Josef jogging from A to C;

speed = 1.9 m/s

ii. velocity = 2.2 m/s

Step-by-step explanation:

One major difference between speed and velocity is that speed is a scalar quantity, while velocity is a vector quantity.

a) Josef jogging from A to B;

distance = 300 m

time = 2.5 seconds = 150 seconds

i. his average speed = \frac{distance}{time}

                               = \frac{300}{150}

                               = 2 m/s

ii. his average velocity = \frac{displacement}{time}

                               = \frac{300}{150}

                               = 2 m/s

b) Josef jogging from A to C,

distance = 300 + 100 = 400 m

time = 2.5 + 1 = 3.5 minutes

        = 210 seconds

i. his average speed = \frac{distance}{time}

                                  = \frac{400}{210}

                                  = 1.9 m/s

ii. his average velocity = \frac{\sqrt{V_{1} ^{2}   + V_{2} ^{2} } }{2}

V_{1} ^{2} = 4 m/s

V_{2} ^{2} = 1.9 m/s

his average velocity = \frac{\sqrt{4^{2} + 1.9^{2}  } }{2}

                                  = 2.2 m/s

5 0
2 years ago
lena finished her assignment in 1/2 hours. then she completed her other assignment in 1/5 hours. what was the total time lena sp
Mekhanik [1.2K]

Answer:

7/10 hours

Step-by-step explanation:

her first assignment took 1/2 hour

her second assignment took 1/5 hour

so in total she took 1/2 + 1/5

we need to find a common denominator

the lcm(2,5)=10

so multiply 1/2 by 5/5 to obtain 5/10

multiply 1/5 by 2/2 to obtain 2/10

5/10 + 2/10 = 7/10

4 0
3 years ago
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