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3 years ago

4. A class has 28 students. The ratio of girls to boys is 4.3. How many girls are in

Mathematics

2 answers:

Mashcka [7]3 years ago

7 0

Answer:

16 girls

Step-by-step explanation:

there are 4 out of 7 girls in the class.

28/7=4 (this is the unite rate per group number)

4 x 4 =16

Sauron [17]3 years ago

6 0

Step-by-step explanation:

So 4:3 means for 4 girls there are 3 boys. In total, that would be 7.

So, we divide 28 by 7 for 4 meaning 1 in the 4:3 is 4.

And since we are dealing with girls, 4*4=16

To check, 4*3=12 Boys and 16+12=28

If this helped, please feel free to pick this answer as the brainliest! Thank you very much and have a wonderful day!

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pogonyaev

Y-1=2(x+3) just plug into the formula

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2 years ago

james invested some money at 13% interest. James also invested $199 more than 3 times that amount at 12%. How much is invested a

Komok [63]

9514 1404 393

Answer:

$3138 at 13%
9613 at 12%

Step-by-step explanation:

Let x represent the amount invested at 13%. Then (3x+199) is the amount invested at 12%. The total interest earned in 1 year is ...

(13%)(x) +(12%)(3x+199) = 1561.50

0.49x +23.88 = 1561.50 . . . . simplify

0.49x = 1537.62 . . . . . . . . . . subtract 23.88

x = 3138 . . . . . . . . . . . . . . . . divide by 0.49

3x+199 = 9613

$3138 was invested at 13%; $9613 was invested at 12%.

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2 years ago

Write the prime factorization of each number then find the greatest common factor of the numbers 40, 48

DedPeter [7]

40= 1,2,4,5,8,10,20,40
48= 1,2,3,4,6,8,12,16,24,48
the gcf is 8.

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3 years ago

5/8 of the 64 musicians in a music contest are guitarists. Some of the guitarists play jazz solos, and the rest play classical s

motikmotik

The first thing we must do for this case is find the number of total guitarists.

We have then:

$(\frac{5}{8}) * (64) = 40$

We now look for the relationship between the number of guitarists playing jazz alone to the total number of guitarists.

We have then:

$\frac{x}{40} = \frac{1}{4}$

Where,

x: number of guitarists playing jazz alone

From here, we clear the value of x.

$x = (\frac{1}{4}) * (40)\\x = 10$

Then, the number of guitarists who play classical solo is:

$40 - 10 = 30$

Answer:

30 guitarists play classical solos in the contest

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