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Arlecino [84]
3 years ago
15

Aquí está mejor Cómo simplificar esta expresión

Mathematics
1 answer:
Ludmilka [50]3 years ago
6 0

Answer:

359/4

Decimal: 89.75

Step-by-step explanation:

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Roy purchased different cardboard pieces that had the same ratio of the length to the width. The table below shows the length an
Alexxandr [17]
6 to 5, 12 to 10, 18 to 15, 24 to 20, x to 25

Let's take a look at x/25 ratio, which has to be equal 6/5.

\frac{x}{25}= \frac{6}{5}  \\
25*6=5x\\
5x=150\\
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The answer is 30 inches.
7 0
4 years ago
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Martha is late for class, so she races her 75 kg body up a 4.0 meter flight of stairs in only 2.3 seconds. What is Martha’s powe
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Answer:

1.3\cdot 10^3\text{ J}

Step-by-step explanation:

Power is defined by work over time. In physics, work can be defined as the energy transferred over from an applied force over some distance. As a formula:

W=Fd, where F = force applied and d = distance that force is applied over.

*It is worth noting that F must be parallel to the distance travelled. If it is perpendicular, no work is done, and if it is at an angle, find the parallel component and use that for F.

In this case, the force applied must counter the force of gravity on Martha, which is given by F_g=mg, where m = Martha's mass and g = gravitational constant 9.8 m/s/s. Therefore, F_g=75\cdot 9.8=735\text{ N}. Since she raises her body 4.0 meters, the work done must be W=Fd=735\cdot 4=2940\text{ J}.

Since power is equal to work over time and t = 2.3 seconds, we have:

\displaystyle P=\frac{W}{t}=\frac{2940}{2.3}=\boxed{1278\text{ J}}\approx \boxed{1.3\cdot 10^3\text{ J}} (to two significant figures)

7 0
2 years ago
PLEASE HELP ME!!! Will mark brainliest
fenix001 [56]
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4 years ago
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4 years ago
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Solve for m<br> 2/5 = m/70 =<br> show work and order of operations
Black_prince [1.1K]

Answer:

m = 28

Step-by-step explanation:

70 × 2 = 5m

140 = 5m

28 = m

4 0
4 years ago
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