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Nat2105 [25]
3 years ago
7

How many times does a dragonfly's wing beat per minute

Mathematics
1 answer:
marshall27 [118]3 years ago
5 0
<span>A dragonfly beats its wings about 30 times a second. This is necessary to allow the insect to keep itself airborne, due to the relative weight of its body. Luckily, dragonflies have two sets of wings, or they would have to work even harder to stay up in the air.</span>
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I need help finding the measure to each angle<br>​
cestrela7 [59]

Answer:

(15x-2)°+( 7x+4)°=90° --> 15x-2°+7x+4°=90° --> 22x+2°=90° --> 22x=90°-2° --> 22x=88° --> x=88/22 --> x=4.

m/_BAC=(15x-2)°=15×4-2 =58°

m/_CAD=(7x+4)°=7×4+4= 32°.

8 0
2 years ago
Which expression is equivalent to <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B2%7D%20%20" id="TexFormula1" title=" \fr
Dennis_Churaev [7]

A - This is the same as : (3*3*3*3)/4 Wrong.

B - This is 12/4 Wrong.

C- This is 3/2 * 3/2 * 3/2 * 3/2 Correct.

4 0
3 years ago
A sixth grade class of 295 students is having an end of the year laser tag party. The party will cost
Korolek [52]

Answer:

The total cost of the party is approximately $2300, hence the correct answer is option D.

Step-by-step explanation:

Given:

Number of students = 295 students

cost per student =  $8.95

Discounts given by the company = $400

To find:

We need to estimate the total cost of the party.  

Solution:

To find the total cost of the party we need to multiply the total number of students into the cost per student.

This can be done as follows:

=295×8.95

=2640.25

Therefore, the total cost of the party is $2640.25, but it is given that the laser tag company gave the students a discount of $400. Hence the total cost after discount is  

=2640.25-400

=2240.25

Therefore, the total cost of the party is approximately $2300

Hence the correct answer is option D.

7 0
3 years ago
The length of a rectangle is two less than four times the width. If the perimeter is 26 cm, find the dimensions of the rectangle
gulaghasi [49]

Answer:

w = 3

l = 10

Step-by-step explanation:

l = 4w-2

P = 26cm

P = (l + w) × 2

26 = (4w-2+w) ×2

26 = (4w + w - 2) × 2

26 = ( 5w - 2 ) × 2

26 ÷ 2 = 5w -2

13 = 5w - 2

13 + 2 = 5w

15 = 5w

w = 3

l = 4w - 2

l = (4 × 3) -2

l = 12 - 2

l = 10

7 0
3 years ago
Y'= x.e^x/ (1+y).y giải pt vi phân cấp 1
Rasek [7]

I’m just trying to get my stuff done can you help me please help

5 0
2 years ago
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