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Vinil7 [7]
3 years ago
7

A painter took a digital photo of a 16-inch wide by 20-inch long painting to display on his website. The digital image is 2.5 in

ches long. What is the area of the image in square inches?
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
7 0
The actual photo has an area of 16*20 inches, so 320 inches squared. The ratio between the digital and real photo is 16:20. On the other hand, the width to length of the digital photo is x:2.5. Cross multiply the two ratios and solve for x. 16/20*x/2.5 —> 20x = 40 —> x = 2. The width of the digital image is 2 inches, so multiplying the width times the length gives you a 5 inches squared area for the digital image. Answer: 5 in^2
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Answer:

Step-by-step explanation:

x2 = 36?

solution

x^2-(36)=0

Factoring:  x2-36

Check : 36 is the square of 6

Check :  x2  is the square of  x1  

Factorization is :       (x + 6)  •  (x - 6)

(x + 6) • (x - 6)  = 0

x+6 = 0

x = -6

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add 6 to both side

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Answer:

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Substitute these values into the equation.

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