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3 years ago

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!

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~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!

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Hope This Helped! Good Luck!

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4 years ago

A race track is made up of a rectangle shape 750 m by 500 m semi circles at each end. Marisol drives the track once at average s

Mkey [24]

Answer:

$d=3071m$

Step-by-step explanation:

From the question we are told that:

Dimension Of rectangle

Length $l=750m$

Breath $b=500m$

Velocity $v=140kmh$

Generally the equation for distance travel by Marsol once round the Circle is is mathematically given by

$d=2(l)+2(arc\ of\ the\ semi\ circle)$

$d=2(l)+2( 2\pi r (\frac{\theta}{360}))$

Where

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3 years ago

Mario invested $475 in $45 and $25 stock shares. The number of $25 shares was 5 less than 3 times the number of $45 shares. How

Anit [1.1K]

$\text{Answer : Number of \$45 shares} =120$

$\text{Number of \$25 shares }\\\\= 3\times 120-5\\\\=360-5\\\\=\$355$

Explanation:

Let Number of $45 shares be x

Let number of $ 25 shares be 3x-25

According to question,

$x+3x-5=475\\\\4x-5=475\\\\4x=475+5\\\\4x=480\\\\x=\frac{480}{4}\\\\x=120$

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