To solve this, you need to isolate/get the variable "r" by itself in the equation:
-1 = -3r + 2r Combine like terms(terms that have the same variable and power/exponent.) The only like terms you can combine are -3r and 2r
-1 = -r Divide -1 on both sides to get "r" by itself
(two negative signs cancel each other out and become positive)
1 = r or r = 1
When you divide 4 by 5 you get 0.8 so your answer would be =
Answer: D is the right answer
Step-by-step explanation:
When <span>b = 10
</span><span>
1. 2(10 + 4) = 16
28 </span>≠ 16 FALSE
<span>
2. 2(10 + 2) = 40
24 </span>≠ 40 FALSE
<span>
3. 3(10 – 2) = 24
24 = 24 TRUE
4. 2(8 + 10) = 42
36 </span>≠ 42 FALSE
<span>
5. 3(10 – 4) = 20
18 </span>≠ 20 FALSE
<span>
Answer is
</span><span>3. 3(b – 2) = 24</span>
30 60 90 triangle
ratio of short leg : hypo = x : 2x
given short leg x = 4 ft
so hypo a = 2x = 2 * 4 = 8
answer
a = 8 ft
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P.S.
if you need to do by using cos sin tan then
Cos (60) = Adj/Hypo = 4/a
a = 4/cos(60) as you know cos(60) = 1/2
so
a = 4 /(1/2 = 4 * 2/1 = 8
answer: a = 8 ft
