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julia-pushkina [17]
3 years ago
15

Jane has a 5 × 7-inch photograph that she wants enlarged to a 10 × 14-inch photograph. What is the scale factor from the origina

l photograph to the enlarged photograph?
Mathematics
2 answers:
Vladimir79 [104]3 years ago
5 0
I think that the answer is 2, because if you multiply two by each factor in the original photograph then you get the size of the new photograph.
Yuki888 [10]3 years ago
5 0

Answer:

2:1

Step-by-step explanation:

it asks for the scale since 5 x 2 = 10 and 7 x 2 = 14

the scale is 2 : 1


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The table shows a proportional relationship between the number of pounds of bananas purchased and the total cost of bananas.
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Answer:

Choice A, C and E

Step-by-step explanation:

<em>Your table is poorly presented</em>

Given

x      y

\begin{array}{cc} {3} & {1.47} \ \\ {5} & {2.45} \ \\ {9} & {4.41} \ \ \end{array}

First, we calculate the constant of proportionality (k)

k = \frac{y}{x}

For (3,1.47)

k = \frac{1.47}{3}

k = 0.49

For (5,2.45)

k = \frac{2.45}{5}

k = 0.49

For (9,4.41)

k = \frac{4.41}{9}

k = 0.49

From the above calculations, the constant of proportionality is 0.49.

So, the usable rows must also have 0.49 as their constant of proportionality

<u>Choice A</u>

(x,y) = (2,0.98)

k = \frac{0.98}{2}

k = 0.49 --- <em>This is usable</em>

<em />

<u>Choice B</u>

(x,y) = (7,4.45)

k = \frac{4.45}{7}

k = 0.64 --- <em>This is not usable</em>

<em />

<u>Choice C</u>

(x,y) = (6,2.94)

k = \frac{2.94}{6}

k = 0.49 --- <em>This is usable</em>

<em />

<u>Choice D</u>

(x,y) = (1,0.54)

k = \frac{0.54}{1}

k = 0.54 ---- <em>This is not usable</em>

<em />

<u>Choice E</u>

(x,y) = (8,3.92)

k = \frac{3.92}{8}

k = 0.49 --- <em>This is usable</em>

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