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maxonik [38]
3 years ago
14

Which of the following are solutions to the the equation tan^2(2x) - 1 = 0? Check all that apply.

Mathematics
2 answers:
trasher [3.6K]3 years ago
8 0

Answer: the answers is D. -pi/8 and B. 3pi/8

Step-by-step explanation:

sergeinik [125]3 years ago
6 0
I think the correct answer is D.
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A shop has 8 different types of postcards and at least 13 of each type. how many selections of 12 postcards are there if
Zolol [24]

Answer:

Answered

Step-by-step explanation:

It is a combbinatorics problem. let's think as we need to do 8 partitions  

of these 13 to separate the postcards of different types. So The number of

partitions of n=13 into r=8 terms counting 0's as terms as  C(n+r-1,r-1)​.

(a)

Here n=13 and r=8, put it in the above formula so we get C(13+8-1,8-1)= C(20,7)= 77520 selections.

b).

Here, either (i) we can choose none of type I or (ii) we choose one of type I

Case(i): r=7, n=12 (Here we have only 7 types to choose from​)

Case(ii): r=7, n=11 (Here we have only 11 cards to choose and only 7 types to choose them from)​

Case (i) + Case(ii) = ,C(12+7-1,7-1) + C(11+7-1,7-1) = C(18,6) + (17,6) = 18564+12376 = 30940 selections.

4 0
3 years ago
Add parentheses to solve the equation 16+3*4-2+5=21
Shalnov [3]

Answer:4

Step-by-step explanation:

5 0
3 years ago
61 × 5 in distributive property ​
Doss [256]

Answer:

305

Step-by-step explanation:

61 x 5 = 305

8 0
2 years ago
Please help show work and I’ll give brainliest
shepuryov [24]
IDK if i have to explain again but
A. (-infinity, infinity)
B. (-infinity, -3]
C. (-infinity, -4)u(-4, 0)u(0, infinity)
those u's are the logic symbol

2. domain: [-6, -1)u(-1, 3]u [3, -infinity)
range: (-infinity, 4]

3a. 8x^2 + 17
3b. 32x^2 + 80x + 53
3c. I cant see the multiplication symbol
7 0
3 years ago
amal is 167 cm tall. Which expression finds Jamal’s height in dekameters? Use the metric table to help answer the question.
LuckyWell [14K]
0.167 every                       .1 per cm
7 0
3 years ago
Read 2 more answers
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