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oksian1 [2.3K]
3 years ago
13

Help please number 9

Mathematics
1 answer:
Vladimir [108]3 years ago
5 0
All you have to do is think about it and trust your gut feeling!
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Write the expression as one<br> involving only sin x and cos x.<br> sin 2x + cos x
AfilCa [17]

Answer:

sin 2x + cos x =  2 sin x cos x + cos x = (2 sin x + 1)cos x

Step-by-step explanation:

Given the expression: sin 2x + cos x,

then we can use the formula: sin 2x = 2 sin x cos x, which gives:

sin 2x + cos x =  2 sin x cos x + cos x = (2 sin x + 1)cos x

So there you have two expressions in terms of sin x and cos x, as requested. :D

6 0
1 year ago
Students were packed shoulder to shoulder in a gym for a pep rally. The students were in a rectangular shaped area of 7,500 ft2.
hram777 [196]

Answer: 1527

Step-by-step explanation:

Total Area = 7500 ft^2

Area covered by one student = Area of one circle

                                                   = π*r^2

r = radius of circle = 2.5/2 = 1.25 ft

Area covered by one student = π*1.25^2 = 4.91 ft^2

Number of students who can fit into total area = Total Area/Area covered by one student

Number of students who can fit into total area = 7500/4.91 = 1527.49

Hence the answer is 1527 students

7 0
2 years ago
Evaluate <br> 15+ (29-13)=
leonid [27]
The answer is 31
29 - 13 is 16
16 + 15 is 31
6 0
3 years ago
For every boy in an advanced math course there are 3 girls who are taking the course.
Nutka1998 [239]

Answer:

If 32 students are enrolled in the course, there would be 24 girls.

Step-by-step explanation:

Given that For every boy in an advanced math course there are 3 girls who are taking the course.

It means if there are four students in the class. There would be 3 girls and 1 boy. Thus, 75% of the students are girls.

Given that there are 32 students enrolled in the course.

so

75% of 32 = 75/100 × 32

                 = 24

Thus, if 32 students are enrolled in the course, there would be 24 girls.

7 0
2 years ago
5.5x = 11? Please help. :c
Ne4ueva [31]

Answer:

The value x would equal to 2
11 divided by 5.5 = 2
5.5 x 2 =11



Step-by-step explanation:

Have a great rest of your day
#TheWizzer

5 0
2 years ago
Read 2 more answers
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