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AfilCa [17]
3 years ago
12

A certain high school has 1,488 students. If you subtract the number of girls from boys you get 78. Let x be the number of boys

and y be the number of girls.
Mathematics
1 answer:
Dahasolnce [82]3 years ago
3 0

Answer:

boys = 705

girls = 783

Step-by-step explanation:

We are to find the number of boys and girls in the school

the answer can be determined using simultaneous equation

x = boys

y = girls

y - x = 78  equation 1

y + x  = 1488 equation 2

subtract equation 1 from 2

2x = 1410

x = 1410/2 = 705

Substitute for x in equation 1

y - 705 = 78

y = 705 + 78 = 783

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3 years ago
The playground of a school has areas fixed for various activities. One-fifth of the playground is used for students to sit and r
sertanlavr [38]

Answer:

2/3* 4/5 = 8/15

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached file below.

Given:

  • One-fifth (1/5)  of the playground is used for students to sit and read
  • 2/3 is used for playing soccer
  • The rest of the playground is used for playing basketball

So assume that the the playground is divided into 5 equal part

=> 1 part is used for students to sit and read or (1/5)

=>  the remaining equal part is 4  or (4/5)

Because 2/3 of the remaining part is used for playing soccer

=> the equation represents the part of the playground used for soccer is:

2/3 of 4/5

= 2/3* 4/5

= 8/15

8 0
3 years ago
A mom bought her kids 3 cartons of milk for $1.25 each and 6 donuts. The total cost was $6.90. Write an equation to determine th
max2010maxim [7]

$6.90 = 6d - ($1.25 x 3)

Donuts = d

I hope I helped

6 0
3 years ago
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We need more info to answer this question
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A $64 item is marked up to $80. Find the percent markup.
swat32

Answer:

The Markup was by 25%

Step-by-step explanation:

The answer is 25% because 25% of 64 is 16

25% * 64 = 16

64 + 16 = 80

So, the price markup was by 25%

Hope this helps! :)

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