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Genrish500 [490]
3 years ago
7

There are students from 6th grade, 7th grade, and 8th grade in band. The 7th grade students make up 20%

Mathematics
2 answers:
sammy [17]3 years ago
7 0

Answer:

400

Step-by-step explanation:

40% of 7th grade is equal to 80

if 80 students from 7th grade makes up 20% then there's 400 students in the band.

Bond [772]3 years ago
3 0

Hey!

------------------------------------------------

~Turn into decimal

40% = 0.4

~Multiply

200 * 0.4 = 80 (7th graders in the band)

Now, we can write this as 80 is 20% of what number.

~Turn into decimal

20% = 0.2

~Divide

80 / 0.2 = 400

------------------------------------------------

Hence, there are \Large\boxed{\mathsf{400}} students in band!

------------------------------------------------

Hope This Helped! Good Luck!

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Evgesh-ka [11]

Answer:

a.  3+\frac{x}{2} =8

b.  x = 10

Step-by-step explanation:

a.  The number of home runs hit by Jack last season = x

It is given that Henry hit 3 more than half as many home runs as Jack hit.

Half of the runs hit by Jack = \frac{x}{2}

3 more than half the runs =  3+\frac{x}{2}

So, the number of home runs hit by Henry =  3+\frac{x}{2}

But, it is given that Henry hit a total of 8 runs.

Therefore,  3+\frac{x}{2} =8

b.   3+\frac{x}{2} =8

Subtract 3 from both sides.

\frac{x}{2} =8-3

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x = 5 × 2

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3 years ago
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3 years ago
A machine with velocity ratio of 5 is used to raise a load with an effort of 500N . If the machine is 80% efficient , determine
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Answer:

Solutions given:

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mechanical advantage [M.A ]

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Juli2301 [7.4K]

Answer:

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