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Rus_ich [418]
3 years ago
11

Can somebody answer this plz

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
7 0

Answer:

Choice B) {-21, -7, 7, 21}

Step-by-step explanation:

The multiples of 7 are: 0, 7, 14, 21, 28, 35, ... both the positive and negative versions of each number. Erase the even numbers in that list to end up with 7, 21, 35, ...

Choice A fits the description, but there are items missing, namely -7 and 7. So this answer choice is crossed off the list

Choice B has both odd numbers and multiples of 7 listed. Every number is listed. This is why this is the answer.

Choice C has multiples of 7, but these are even numbers. We can cross it off the list.

Choice D is a similar story to choice C, though it has some odd numbers in this list.

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ohaa [14]

Answer:

<em>if Petra uses a scale of 1 in = 50 miles, the distance of 400 miles would fit in the page.</em>

Step-by-step explanation:

<u>Scaling</u>

Objects can be represented in a reduced or augmented size by using scaling.

Scaling is essentially multiplying or dividing by a constant factor. We use scaling when representing geographic locations on a map.

Petra has a piece of paper that is 8.5 inches wide and 11 inches long and she wants to represent a distance of 400 miles by using the scale factor of 1 inch= 20 miles.

a)

Dividing the real distance by the scale factor we get 400/20 = 20 inches. Petra would need 20 inches of paper to represent the scaled distance. That distance won't fit in any direction of the paper, so she actually cannot make the scale drawing.

b)

To make the drawing, the distance of 20 inches should fit into the page in any orientation, let's assume it's done across the paper's width of 8.5 inches.

Dividing 400 / 8,5 = 47

This gives us an idea of the appropriate scale factor. We can use a round number like 50. Thus, if Petra uses a scale of 1 in = 50 miles, the distance of 400 miles would fit in the page.

7 0
3 years ago
The length of the rectangle is 10.4cm. the perimeter of the rectangle is 28cm. calculate the area of the rectangle.
PilotLPTM [1.2K]

Answer:

37.44 cm²

Step-by-step explanation:

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To find the area, multiply the width and the length together.

10.4*3.6=37.44

The area of the rectangle is 37.44 cm²

Hope this helps!

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