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xenn [34]
3 years ago
12

Roger has $2, $1 and 50 cent pieces in the ratio of 5:4:2. If 30 of roger’s coins are 50 cent pieces, how many $2 coins and $1 c

oins does roger have after buying a $1 sundae from Maccas?
Need help asap!!
I don’t understand!!
Mathematics
2 answers:
melomori [17]3 years ago
6 0
You have $0 left after buying the sundae
rosijanka [135]3 years ago
4 0

Answer:

Step-by-step explanation:

So the ratio is 5:4:2

there are 11 parts to this ratio (5+4+2)

the 5 is for the $2, the 4 is for the $1 and the 2 is for the 50 cents

he has 30 of the 50 cents

so you divide 30 by 2 to get one part of this ratio

1 part of this ratio is equal to 15 coins

multiply 15 by 5 to get the number of $2 coins: 75

multiply 15 by 4 to get the number of $1 coins: 60

add all of those parts together

30+60+75 = 165

If he uses a $1 coin to buy the sundae he will have 75 $2 coins and 59 $1 coins left

however, if he uses two 50 cents coins to buy the sundae he will have 75 $2 coins and 60 $1 coins left

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6 0
3 years ago
Solve the equation for x<br><br> 5(x-3)+2x=4(x+3)
Tamiku [17]

x = 9

Step-by-step explanation:

5x - 15 + 2x = 4x + 12

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8 0
2 years ago
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What is the answer to 10-2.7y=y+9
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Ainat [17]

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3 years ago
A right prism has height 7½ and triangular bases with sides of length 5, 12, and 13 What is the: Total Surface Area of the Prism
sdas [7]

Given:

A right prism has height 7½ and triangular bases with sides of length 5, 12, and 13.

To find:

The total surface area of the prism.

Solution:

We have,

Height of prism = 7½ = 7.5

Sides of triangular base are 5, 12, 13. These sides of Pythagorean triplets because

5^2+12^2=13^2

25+144=169

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So, the base of the prism is a right triangle.

Area of a triangle is

Area=\dfrac{1}{2}\times base \times height

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The area of the base is equal to the area of the top, i.e., A_2=30 sq units.

Perimeter of the base is

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The curved surface area of the prism is

CSA=\text{Perimeter of the base}\times \text{Height of the prism}

CSA=30\times 7.5

CSA=225

Now, the total area of the prism is

A=A_1+A_2+CSA

A=30+30+225

A=285

Therefore, the total surface area of the triangular prism is 285 square units.

5 0
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