Answer:
21/4
Step-by-step explanation:
(5 * 4) + 1
20 + 1
21/4
Answer:
the answer is B
Step-by-step explanation
Cant really explain but next time put the topic for the subject so people will understand.
Answer:
-(-3) ± √(-3)^2 - 4(2)(-5) / 2(2) (the last choice).
Step-by-step explanation:
Im ignoring the 2^2 in the equation
The equation transforms to
2x^2 - 3x - 5 = 0 (standard form)
So x = -(-3) ± √(-3)^2 - 4(2)(-5) / 2(2)
Plug in the values 1,4, and 9 into the equation one by one. Plug it in as the x value.
y=-1/2 times root 1 = -1/2
(x,y)=(1,-1/2)
y=-1/2 times root 4 = -1
(x,y)=(4,-1)
y=-1/2 times root 9 = -3/2
(x,y)=(9,-3/2)
Answer:
645/100 = 129/20 or 6.45
645/50 = 129/10 or 12.9
48.6/30 = 1.62
48 divided by x = 48.6/x
Step-by-step explanation:
645/100
Factor the number:
= 5*129/100
Factor the number:
= 5*129/5*20
Cancel the common factor:
= 129/20
645/50
Factor the number:
5*129/50
Factor the number:
5*129 / 5*10
Cancel the common factor:
= 129/10
48.6/30
Write the problem in long division format
Multiply the quotient digit (1) by the divisor (30)
Subtract 30 from 48
Add a decimal and bring down the next number
Divide 186 by 30 to get 6
Continue...A few steps later...
Subtract 60 from 60
Solution is 1.62
48.6/x
Re-write division as a fraction:
48.6/x
