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alexira [117]
3 years ago
15

If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis

Mathematics
1 answer:
ruslelena [56]3 years ago
4 0

Answer:

draw a right angle triangle

Step-by-step explanation:

Let one of the angles be A  

cos A = sin (90-A)  

90 - x - 20 = x  

2x = 70  

x = 35 degrees

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Describe the following set as either finite or infinite.
serg [7]

Answer:

infinite

Step-by-step explanation:

6 0
3 years ago
During the early 20th century, in what way was the radio better than the phonograph in encouraging the concept of crosspollinati
ololo11 [35]

C. Phonograph were inferior in sound quality.

Step-by-step explanation:

Researches have shown that plants respond to the sounds of their pollinator.

Some plants begin to produce a greater amount of nectar and some begin to vibrate to attract the attention of the pollinators towards them.

Greater the intensity of the sound of the pollinator, the faster the reaction will be.

Phonographs have a sound of lower intensity when compared to the intensity of sound produced by the radio.

Thus the radio was better than the phonograph in encouraging the concept of cross-pollination.

6 0
3 years ago
Algebraic expression 6 times a number,n
trasher [3.6K]

6 times a number n is 6n.

In algebra, when number multiply with variables, you don't need a multiplication sign (x). You just put them together like 6n (instead of 6 x n).

Happy to Help!

6 0
3 years ago
Carina spent a total of $5.27 buying a pineapple for $3.40 and several pounds of tomatoes that were on sale for $0.85 per pound.
gulaghasi [49]
Okay so I'm going to set up a equation:

5.27= 3.40+ 0.85x, we have our total our price of one pineapple and our variable

next I isolate the variable:

5.27-3.40=0.85x

next:

1.87=0.85x

x= 2.2

she bought 2.2 pounds of tomatoes
7 0
3 years ago
Read 2 more answers
Use the slope formula to find the slope between the two given points.
mario62 [17]

Answer:

7) 1

8) -2

9) undefined (no slope)

10) 4/3

11) -2/7

12) 0

Step-by-step explanation:

to find the slope when given to points ... minus the y values and x values

formula :

y - y

------  =  slope

x - x

4 0
3 years ago
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