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WARRIOR [948]
3 years ago
13

17/18 -3/7= need answer please

Mathematics
1 answer:
Umnica [9.8K]3 years ago
4 0
\dfrac{17}{18}-\dfrac{3}{7}=\\
\dfrac{119}{126}-\dfrac{54}{126}=\\
\dfrac{65}{126}

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wlad13 [49]
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3 years ago
Find the area of this regular polygon.<br> Round to the nearest tenth.<br> 8.65 mm<br> [? ]mm2
nadezda [96]

Answer:

Actually it's not polygon. it's a nonagon. With r=8.65mm″, the law of cosines gives us side a:

a=√{b²+c²−2bc×cos40°}

a=√{149.645−149.645cos40°}

Area Nonagon = (9/4)a²cos40°

=9/4[149.645−149.645cos40°]cot20°

=336.70125[1−cos(40°)]cot(20°)

Applying an identity for the cos(40°) does not get us very far…

= 336.70125[1−(cos2(20°)−1)]cot(20°)

= 336.70125[2−cos2(20°)]cot(20°)

= 336.70125[2−(1−sin2(20°))]cot(20°)

= 336.70125[1+sin2(20°)]cos(20°)sin(20°)

= 336.70125[cot(20°)+sin(20°)cos(20°)]mm²

3 0
3 years ago
Find the area of the shaded region in the polygon below.
mezya [45]

Answer:

35

Step-by-step explanation:

I multiply 3 and 7 that give 35

8 0
3 years ago
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Solve for y: 15 = y – 7
mixer [17]

Some number y has 7 subtracted off to get 15. We have y-7 = 15. To isolate y, we have to undo the "subtract 7" operation that happens to y. We have to add 7 to both sides.

y-7 = 15

y-7+7 = 15+7

y = 22 is the answer

8 0
3 years ago
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Some students washed 24 cars in 2 hours. how many cars can they wash in 15 hours?
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Itd be c.180 because itd be 12 cars each hour so times 12 by 15
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