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Hunter-Best [27]
3 years ago
5

Plz help I need help

Mathematics
1 answer:
ruslelena [56]3 years ago
8 0

Answer:

x = 6

Step-by-step explanation:

<em>This can be written as a ratio</em>

7 : 2

21 : x

<em>If you times one side by 3, you have to multiply the other side by three too:</em>

2 × 3 = 6

∴ x = 6 when y = 21

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a girl scout troop wants to earn at least $3,000 by selling girl scout cookies if each box cost $5 and supplies cost $150 write
andrezito [222]
3150/5=630. They must sell 630 boxes
3 0
4 years ago
Samuel was preparing for the triathlon. He did 3 activities every morning: Ran for 30 minutes, covering 4.5 miles. Swam for 20 m
Setler [38]

Speed can be defined as the <em><u>distance covered per time. </u></em>

The average speed formula is given as: Distance/Time

The average speed of Samuel's morning training is 7 2/3 miles/hour

We are to calculate the time in hours. Remember conversion rate :

60 minutes = 1 hour

He did 3 activities every morning

  • a) Ran for 30 minutes, covering 4.5 miles.

60 minutes = 1 hour

30 minutes = ?

Cross Multiply = 30 minutes x 1 hour / 60 minutes

= 0.5 hour

Hence: Speed = 4.5 miles/0.5 hour

=  9 miles/hour

  • b) Swam for 20 minutes, covering 2/3 miles

60 minutes = 1 hour

20 minutes = ?

Cross Multiply = 20 minutes x 1 hour / 60 minutes

= 1/3 hour

Hence: Speed = 2/3 miles/ 1/3 hour

=  2/3 x 3/1 (miles/hour)

= 2 miles/hour

  • c) Biked for 45 min, covering 9 miles.

60 minutes = 1 hour

45 minutes = ?

Cross Multiply = 45 minutes x 1 hour / 60 minutes

= 3/4 hour

Hence: Speed = 9 miles/ 3/4 hour

=  9 x 4/3 (miles/hour)

= 12 miles/hour

  • Samuel's average speed during his morning training is calculated as:

(9 + 2 + 12) miles/hour / 3

= 23/3

= 7 2/3 miles/hour

To learn more, visit the link below:

brainly.com/question/14796641

7 0
3 years ago
Number 13 ASAP ASAP thanks<br> And 14 if you don’t mine pls
Luda [366]

Answer:

C - $8.75

Step-by-step explanation:

I'm pretty sure if you divide 3.75 by 3 you will get the amount of $ for a bag of soil which is around $1.25/per bag. And then if you multiple $1.25 for 7 bags you will get $8.75

6 0
3 years ago
Read 2 more answers
Need help fast, please
Eduardwww [97]

Answer:

i need to guess that it be inverse and probably a.

Step-by-step explanation:

3 0
4 years ago
A company rents out 15 food booths and 20 game booths at the country fair. The fee for a food booth is $100 plus $5 per day. The
Gennadij [26K]

Answer:

So the required expression is $(150 + 12d)

Step-by-step explanation:

Total Food booths rented = 15

Total game booths rented = 20

Fixed one day food booth Price = $100

Per day price of food booth = $5

Fixed one day game booth Price = $50

Per day price of game booth = $7

Total No of days = d

To write an expression the company paid for  both in dollars

As we have got the no of days

So Company paid Money for d days for food booth = Total days * price per day

                                                                              = d * $ 5

                                                                              =$ 5 d


So Company paid Money for d days for game booth = Total days * price per day

                                                                              = d * $ 7

                                                                              =$ 7 d

Total Paid for food booth = Fixed price + D days Price

                                          = $ 100 + $ 5d

Total Paid for game booth = Fixed price + D days Price

                                          = $ 50 + $ 7d

Total Company Paid = Total Paid for food booth + Total Paid for game booth

putting in the values gives us                  

Total Company Paid = $(100 + 5d) + $(50 +7d)

Adding the similar terms gives

Total Company Paid = $(100 + 50) + $(5d +7d)

Total Company Paid = $(150 + 12d)

So the required expression is $(150 + 12d)

7 0
3 years ago
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