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siniylev [52]
3 years ago
6

Create a proof to prove

Mathematics
1 answer:
Mice21 [21]3 years ago
6 0
Cos(x+90)=> -sinx
Cos90=sin
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What is the value of 7 in 46.897
jok3333 [9.3K]

Answer:

one thousandths

Step-by-step explanation:

4 is 10

6 is one

8 is tenths

9 is one hundredths

7 is one thousandths

4 0
3 years ago
Read 2 more answers
A sequence can be generated by using fn = 2f(n-1)+1, where f1 = 4 and n is a whole number greater than 1. What are the first fou
hoa [83]

Answer:

<em>{9,19,39,79}</em>

Step-by-step explanation:

<u>Recursive Sequences</u>

The recursive sequence can be identified because each term is given as a function of one or more of the previous terms. Being n an integer greater than 1, then:

f(n) = 2f(n-1)+1

f(1) = 4

To find the first four terms of the sequence, we set n to the values {2,3,4,5}

  • For n=2

f(2) = 2f(1)+1

Since f(1)=4:

f(2) = 2*4+1

f(2) = 9

  • For n=3

f(3) = 2f(2)+1

Since f(2)=9:

f(3) = 2*9+1

f(3) = 19

  • For n=4

f(4) = 2f(3)+1

Since f(3)=19:

f(4) = 2*19+1

f(4) = 39

  • For n=5

f(5) = 2f(4)+1

Since f(4)=39:

f(5) = 2*39+1

f(5) = 79

4 0
3 years ago
Which of the following are perfect squares select all that apply
mestny [16]

Step-by-step explanation:

the perfect squares =

81, 121, 625

4 0
3 years ago
Read 2 more answers
-4x - 28y=56 4x + 14y=-28
ddd [48]
Adding the 2 equations will eliminate x because -4x + 4x = 0
so we get
-14y = 28
y = -2
plug this into the second euqtion:-
4x + 14(-2) = -28
4x  - 28 = -28 
x = 0

answer is x = 0 , y = -2
4 0
3 years ago
Help!! I need help!<br>​
Tasya [4]

Answer:

C

Step-by-step explanation:

-5x-49>113

    +49  +49

———————-

-5x>162

—-   ——

-5     -5

x<32.4

6 0
3 years ago
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