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stepladder [879]
3 years ago
5

Ashley needs to buy some pencils. Brand A has 20 pencils for $6. Brand B has 40 pencils for $8.50. Based on the unit price, whic

h brand is the better deal
Mathematics
1 answer:
Kruka [31]3 years ago
3 0

Answer:

The answer to your question is Brand B

Step-by-step explanation:

Data

Brand A   amount of 20 pencils     cost $6

Brand B   amount of 40 pencils     cost $8.5

Process

1.- Calculate the unit price of each brand of pencils dividing the cost by the number of pencils

Brand A      6/20 = $0.3

Brand B      8.5/40 = $0.21

2.- Conclusion

Brand B is a better deal because you buy more pencils for a lower price.

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4√2-7√2= (4-7)√2 = -3√2 
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What is 21,079,000.29 rounded to the nearest hundred thousand
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The answer would be 21,000,000.00
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What transformation is represented by the rule (x, y)→(−y, x) ?
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Linear functions? I'm pretty sure it means a reflection of a line 
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Write the equation of the line that passes through (-1, 11) and (3, -5)
Genrish500 [490]

Answer:

y= -4x+7

Step-by-step explanation:

The equation of a line is usually written in the form of y=mx+c, where m is the gradient and c is the y-intercept.

Let's find the gradient of the line first.

gradient =  \frac{y1 - y2}{x1 - x2}

Using the above formula,

m =  \frac{11 - ( - 5)}{ - 1 - 3}  \\ m =  \frac{11 + 5}{ - 4}  \\ m =  \frac{16}{ - 4}  \\ m =  - 4

Susbt. m= -4 into the equation:

y= -4x +c

Subst. a coordinate to find c.

When x=3, y= -5,

-5= -4(3) +c

-5= -12 +c

c= 12 -5

c=7

Thus the equation of the line is y= -4x +7.

8 0
3 years ago
Mr. Smith has an online cooking show. Before he films an episode about baking the perfect pound cake, he prepares his ingredient
Kay [80]

Mr. Smith has an online cooking show. Before he films an episode about baking the perfect pound cake, he prepares his ingredients. His recipe calls for 2 1 /2 cups of sugar for the cake and 1 1/ 4 cups of sugar for the vanilla glaze. How many 1 /4 -cup scoops of sugar does he need? Write your answer as a whole number, fraction, or mixed number. Simplify any fractions.

Answer:

15

Step-by-step explanation:

We are given

Mr. Smith's recipe calls for 2 1/2 cups of sugar for the cake and 1 1/4 cups of sugar for the vanilla glaze.

The total amount of sugar he would need

2 1/2 + 1 1/4

= (2 + 1) + (1/2 + 1/4)

= 3 3/4 cups of sugar.

We need this amount of sugar in 1/4 cup scoops.

This is calculated as:

let x be the number of scoops needed

x * 1/4 = 3 3/4

x* 1/4 = 15/4 ( 3 3/4 = 15/4)

x= 15

Therefore, he would be needing 15 , 1/4 cup scoop of sugar

5 0
3 years ago
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