To do it mentally means to do it in your head
first do 7 * 3 = 21 in your head
than do 7 * 0.8 = 5.6 ( this might be hard to do in your head but you know 7*8 = 56 so add a decimal since it is 0.8 not 8 )
Add : 21 + 5.6 = 26.6
Final Answer : 26.6
The answer is B.........(m^(2/3))(n^(5/3))
Answer:
=
Step-by-step explanation:
The n th term of a geometric sequence is
= a
where a is the first term and r the common ratio
Here a = 14 and r = = - , thus
= 14 × = 14 × = =
Answer:
(1,3) and (4,6)
Step-by-step explanation:
<u>----Solve by substitution---</u>
Add 4x to both sides
Subtract 2 from both sides
Subtract 5x from both sides
x^2-5x+4 = 0
Factor , = (x-4)(x-1)
First variable : x = 1 and x = 4
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<u>Substitute</u> 1 for x in the 2nd equation
y=(1)+2 = 3
First answer is (1,3)
---------------------------------
<u>Substitute</u> 4 for x in the 1st equation
4^2-4(4)+6 = 6
Second answer: (4,6)