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Aleonysh [2.5K]
4 years ago
12

Me ajudem, é urgente!

Mathematics
1 answer:
Blababa [14]4 years ago
5 0

Step-by-step explanation and answers:

<em>a)</em> y=3x+1

y=3*(-1)+1= -3+1= -2

y=3*0+1=0+1=1

y=3*1+1=3+1=4

<em>b) </em>y= -3x+1

y= -3*(-1)+1=3+1=4

y= -3*0+1=0+1=1

y= -3*1+1= -3+1= -2

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Drinking 8 fluid ounces of milk provides 270.0 milligrams of calcium. How many fluid ounces of milk provide 72.5 milligrams of c
Margarita [4]
Set up a proportion:

\frac{8}{270} = \frac{x}{72.5}

The numerator represents fluid ounces of milk, and the denominator represents milligrams of calcium.

Simplify the first fraction to make multiplication easier:

\frac{8}{270} \div  \frac{2}{2} =  \frac{4}{135}
\frac{4}{135} = \frac{x}{72.5}

Cross multiply the fractions:

72.5 * 4 = 290
135x = 290

Divide both sides by 135 to get x by itself:

290 \div 135 = 2.1
x = 2.1


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3 years ago
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Showing the relationships among concepts.
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1.A five - layer of cake weighs half a kilogram per layer.In each layer,the cake is decorated with icing which weighs 15g.3 cand
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Answer:  2.815 kilograms

======================================================

Work Shown:

1 layer = 0.5 kg

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The total weight is therefore: 2.5+0.015+0.3 = 2.815 kilograms

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