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Julli [10]
2 years ago
8

for each problem, define the variable, write and inequality and find the solution. Ian needs to save at least $85.00 for a new p

air of basketball shoes. He has $25.00 in his piggy bank, and can save $12.00 from his allowance each week. How many weeks will Ian need to save to earn at least $85.00?
Mathematics
1 answer:
tresset_1 [31]2 years ago
6 0

Answer:

he'll need to save for 5 weeks to get $85

Step-by-step explanation:

hope this helps :)

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The angels of a triangle have a sum of 180°. The angles of a rectangle have a sum of 360°. The angels of a pentagon have a sum o
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Step-by-step explanation:

It is given that the angels of a triangle have a sum of 180°. The angles of a rectangle have a sum of 360°. The angels of a pentagon have a sum of 540.

<u>Let me define the each terms.</u>

1. We know that each angle in a triangle is 60°, So there is a three angle in a regular triangle.

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2. We know that each angle in a rectangle, is 90°, So there is a four angle in a regular rectangle.

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Similarly,

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So, sum of the angles of an octagon = 135° × 8

Sum of the angles of an octagon = 1080°

Therefore, the required sum of the angles of an octagon is 1080°

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Is math important in real life?
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dmitriy555 [2]

Answer:

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Step-by-step explanation:

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5x+2=5

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7 0
3 years ago
the diagram shows a star made by surrounding a regular octagon with triangles, explain why angle a must be 135 degrees
horsena [70]

Answer:

From the sum of angles on a straight line, given that the rotation of each triangle attached to the sides of the octagon is 45° as they move round the perimeter of the octagon, the angle a which is supplementary to the angle turned by the triangles must be 135 degrees

Step-by-step explanation:

Given that the triangles are eight in number we have;

1)  (To simplify), we consider the five triangles on the left portion of the figure, starting from the bottom-most triangle which is inverted upside down

2) We note that to get to the topmost triangle which is upright , we count four triangles, which is four turns

3) Since the bottom-most triangle is upside down and the topmost triangle, we have made a turn of 180° to go from bottom to top

4) Therefore, the angle of each of the four turns we turned = 180°/4 = 45°

5) When we extend the side of the octagon that bounds the bottom-most triangle to the left to form a straight line, we see the 45° which is the angle formed between the base of the next triangle on the left and the straight line we drew

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3 years ago
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