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svet-max [94.6K]
3 years ago
10

regular octagon rotates 360° about its center. How many times does the image of the octagon coincide with the preimage during th

e rotation?
Mathematics
1 answer:
Galina-37 [17]3 years ago
7 0
An octagon has 8 sides, a rotation of 45° (360°/8) will map the octagon onto its preimage. Answer is 8.
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At 106°F, a certain insect chirps at a rate of 67 times per minute, and at 108°F, they chirp 83 times per minute. Write an equat
Step2247 [10]

Answer:

y=8x-781

Here, x represents temperature and y denotes rate of chirping per minute.

Step-by-step explanation:

Let x represents temperature and y denotes rate of chirping per minute.

At 106°F, a certain insect chirps at a rate of 67 times per minute.

Take (x_1,y_1)=(106,67)

At 108°F, they chirp 83 times per minute.

Take (x_2,y_2)=(108,83)

Slope intercept form:

y-y_1=(\frac{y_2-y_1}{x_2-x_1})(x-x_1)

y-67=(\frac{83-67}{108-106})(x-106)\\\\y-67=(\frac{83-67}{108-106})(x-106)\\\\y-67=(\frac{16}{2})(x-106)\\\\y-67=8(x-106)\\y-67=8x-848\\y=8x+67-848\\y=8x-781

3 0
3 years ago
Need help on a systems of equations word problem
lapo4ka [179]

Answer:

brazil: 12.8 portugal: 14.769230769230769 (you need to round it)  

Step-by-step explanation:

just divide.

8 0
2 years ago
Use multiples to write two fractions equivalent to 7/9.
Nitella [24]

Answer:

\frac{14}{18} , \frac{21}{27}

Step-by-step explanation:

To create equivalent fractions multiply the numerator and denominator of the fraction by the same multiples.

Using a multiple of 2, then

\frac{7}{9} = \frac{7(2)}{9(2)} = \frac{14}{18}

Using a multiple of 3, then

\frac{7}{9} = \frac{7(3)}{9(3)} = \frac{21}{27}


4 0
3 years ago
Help please
Leni [432]
So they need $125 to start a slime business.
To get money Carrie start to sell cupcakes for 0.50 cents

Juanita will be selling cards for $2.25

Juanita is selling cards for $2.25 and she is selling at least 35 of them

Carrie is selling cupcakes for 0.50 cents and the number of cupvakes is three times the number of cards so we will multiply 35 x 3=105 number of cupcakes

Then we will multiply 0.50 cents x 105= $53.2 on the cupcakes.

After that, we will multiply $2.25 x 35 for the cards = 78.5

Finally add them together
78.5
+53.3
---------
$ 131.8

So they will have $131.8 after selling cupcakes and cards.
7 0
2 years ago
X+7=8 solve this one step equations
Ira Lisetskai [31]
1+7=8. x=1 Because 8 minus 7 is 1
8 0
3 years ago
Read 2 more answers
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