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OleMash [197]
3 years ago
7

The National Research Council recommends keeping a 1:3, colon, 3 copper to zinc ratio in a horse's diet. If the horse is getting

420 milligrams (\text{mg})(mg)left parenthesis, start text, m, g, end text, right parenthesis of zinc per day, how many milligrams of copper does the Council recommend the horse have?

Mathematics
1 answer:
kap26 [50]3 years ago
4 0

Step-by-step explanation:

Below is an attachment containing the solution.

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franklin school has 3 boys for every 4 girls in the fifth grade. there are 140 students in the 5th grade. How many boys are ther
marin [14]

Answer:

There are 60 boys and 80 girls in Franklin School.

Step-by-step explanation:

"franklin school has 3 boys for every 4 girls in the fifth grade." means that the ratio of boys to girls is: 3:4

It can also be written as 3/4

Also given

Total number of students: 140

We will use ratios to find the number of boys and girls in shool.

First of all, we have to calculate the sum of ratio which is: 3+4 = 7

Let b be the number of boys and g be the number of girls

Then

b = \frac{Ratio\ of\ boys}{Sum\ of\ ratio} * Total\ students\\= \frac{3}{7} * 140\\= 3*20\\=60\\g = \frac{Ratio\ of\ girls}{Sum\ of\ ratio} * Total\ students\\g = \frac{4}{7}*140\\= 4*20\\=80

Hence,

There are 60 boys and 80 girls in Franklin School.

3 0
3 years ago
How do you solve 9r=3r+6
Lesechka [4]
9r=3r+6
Subtract 3r from both sides
6r=6
Divide both sides by 6
r=1
7 0
2 years ago
Read 2 more answers
The Eagle Club wants to build a chain of 2,505 dominoes. If they have already set up 807 dominoes, how many more do they need to
Sloan [31]

Answer:

1698

Step-by-step explanation:

4 0
3 years ago
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A certain book is sold in a paperback version for 4.75 or in a hardcover versoin for 11.50, If a copy of the book is being purch
mote1985 [20]

Answer:

$135

Step-by-step explanation:

Paperback=$4.75

Hardcover=$11.50

Multiply 4.75 and 20=95

Multiply 11.50 and 20=230

Subtract 230 and 95=135

so it would be $135

4 0
3 years ago
James went out for. a long walk . he walked 3/4 mile and then sat down to take rest. then walked 1/8 of a mile how far did he wa
Karo-lina-s [1.5K]

change 3/4 to 6/8 and add 6/8 and 1/8 to get 7/8

he walked 7/8 miles in total :)

6 0
3 years ago
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