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DENIUS [597]
3 years ago
12

PLEASE HELP ME

Mathematics
1 answer:
Andru [333]3 years ago
7 0
8 people have finished the race in 30 minutes
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The school has arranged to have the gym walls plastered. It takes 200 pounds of lime to make one batch of plaster. Each batch of
elixir [45]

Answer:

D or 3800

Step-by-step explanation:

Just divided 855 by 45 then multiplied 200 by 19

Please mark me brainlest

4 0
2 years ago
A regular decagon has 10 sides. How many reflectional symmetries does a regular decagon have?
lina2011 [118]

The rule for regular polygons are very easy. The number of reflectional symmetries is same as the number of sides. Regular polygons have all sides the same length and all angles same. Reflection symmetry means that you can fold the shape along that line and it will match up.

For this question, we want the number of reflectional symmetries of a regular decagon. Decagon is a 10 sided figure. Hence, the number of reflectional symmetries is 10.

There are 5 symmetry lines from one vertex to opposite vertex and 5 more symmetry lines form midpoint of one side to midpoint of opposite side.

ANSWER: 10

7 0
3 years ago
Read 2 more answers
Find the exact or approximate area of the shaded region
Lana71 [14]

Answer: 18.24 cm^2

Step-by-step explanation:

the two 135 degree angles indicate that the third angle (the one with the shaded region) is 90 degrees, which means that the shaded region is within 1/4 of the circle.

1. In order to find the area for that 1/4 region, you would have to find the area of the circle and divide it by 12

[r^2(3.14)]/4      pi is substituted by 3.14, and the radius is 8.

50.24 is the area of 1/4 of the circle.

2. Next you'd have to find the area of the triangle formed by the shaded region, and subtract the triangle from the area of the 1/4 circle.

the triangle is an isoceles triangle with two sides each valuing at 8cm, so to find the area of the triangle you would multiply the two sides (or square them since they're the same number) and divide by two

this means the triangle is 32 cm^2

3. we can subtract the 1/4 circle (50.24) by the area of the triangle (32) to get the area of the shaded region, which is <u>18.24 cm^2</u>

7 0
2 years ago
Write the linear equation in slope-intercept form.<br><br> -6x + y = 19
Aleonysh [2.5K]
Your answer would be y= 6x + 19


You get rid of the variable on the left side by adding it to both sides giving you y = 6x + 19
Hope it helps
6 0
3 years ago
A swimming pool holds 250,000 gallons of water and is being drained at 200 gallons per minute. How many gallons remain in the po
seropon [69]

Answer:

After 5 minutes, the pool will hold 249,00 gallons of water.

After 20 minutes, the pool will hold 246,000 gallons of water.

6 0
2 years ago
Read 2 more answers
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