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Viktor [21]
3 years ago
11

The ratio of pink marbles to white marbles is 1:5 what percent of bag is pink marbles

Mathematics
1 answer:
sashaice [31]3 years ago
6 0
1:5=1/5
1/5=20/100
20/100= 20%
20% of bag is pink marbles
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6 16x + 5y = -2<br> 4x - y=-2
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Answer:

x=2/9,y=26/9

Step-by-step explanation:

This is a simultaneous equation

16x+5y=-2..(1)

4x-y=-2...(2)

From (2) make y the subject of formula

y=4x+2..(3)

Substitute (3) into (1)

16x+5(4x+2)=-2

16x+20x+10=-2

36x-10=-2

Add 10 to both sides

36x=8

Divide both sides by 36

x=8/36

Divide both denominator and numerator by 4

x=2/9

Substitute the value x into (3)

y=4(2/9)+2

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y=8+18/9

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Simplify completely -4m(9m+5)​
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Step-by-step explanation:

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The diagram shows a polygon. Find the area, in cm², of the whole diagram. ​
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Five widgets and three gadgets cost $109. 90.
erma4kov [3.2K]

Answer:

one gadget costs $15.80

Step-by-step explanation:

Let w = cost of one widget

Let g = cost of one gadget

Given:

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Given:

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⇒ w + 4g = 75.7

Rewrite  w + 4g = 75.7  to make w the subject:

⇒ w = 75.7 - 4g

Substitute into  5w + 3g = 109.9  and solve for g:

⇒ 5(75.7 - 4g) + 3g = 109.9

⇒ 378.5 - 20g + 3g = 109.9

⇒ 378.5 - 109.9 = 20g - 3g

⇒ 268.6 = 17g

⇒ g = 15.8

Therefore, one gadget costs $15.80

To find the cost of one widget, substitute the found value for g into
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⇒ w = 75.7 - 4(15.8)

⇒ w = 75.7 - 63.2

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Therefore, one widget costs $12.50

5 0
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