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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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A parabola has a vertex at (0,0). The equation for the directrix of the parabola is x = –4. In which direction does the parabola
zaharov [31]

The parabola with vertex at (0,0) and directrix at x=-4, will open towards the right.

<h3>What is a directrix?</h3>

A parabola is a collection of points on a plane that are all at the same distance from a particular point and line. The point is called the focus of the parabola while the line is called the directrix. The directrix is perpendicular to a parabola's axis of symmetry and does not contact it.

As we know that the directrix is perpendicular to the axis of the parabola, now since the directrix is at x=-4, the parabola will be horizontal and will be opening either towards the left or the right.

As it is given that the vertex of the parabola is at (0,0) and we know that the parabola can not touch the directrix, therefore, the parabola's vertex will be at (0,0) and will open towards the right side. As shown below.

Hence, the parabola with vertex at (0,0) and directrix at x=-4, will open towards the right.

Learn more about Directrix:

brainly.com/question/2629634

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2 years ago
If two sides of a triangle are proportional to the corresponding sides of another triagle and if their included angles are _____
harina [27]
The angles need to be congruent for the two triangles to be similar.

Hope this helps :)
5 0
3 years ago
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Yellow Cab Taxi charges a $1.75 flat rate in addition to $0.65 per mile. Katie has no more than $10 to spend on a ride. How many
spayn [35]
About  miles. 

Subtract the flat rate of 1.75 from the spending limit of 10$ which leaves you with 8.25 then divide the rest of your spending money (8.25$) into your rate per mile (0.65) , so essentially , 8.25 / 0.65 which leaves you with the answer of ;
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Naily [24]

Answer:

x≤9

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9+2x≤27

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2x≤18

2) Divide both sides by 2:

x≤9

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3 years ago
Help! Need by 10:30 to turn in and I'm confused!
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21.97 tissues

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1.19x15.47

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