The answer would be 3 root 11
28 / 49
divide by 7 at top and bottom
(28/7) / (49/7)
4 / 7
Answer:
The boy has 28 blue pencils
Step-by-step explanation:
Given
Total pencils = 40
The ratio of red to blue= 0.15:0.35
We have to find the number of blue pencils
For that we need the sum of ratio = 0.15+0.35 = 0.5
So, the number of blue pencils = (ratio of blue/sum of ratio) * total pencils
=0.35/0.5 * 40
=0.7*40
=28 pencils
Therefore, the boy has 28 blue pencils ..
Answer:
Simplification of the expression (x−3)( x^2−4x−7) is x³ -7x² + 5x + 21 .
Step-by-step explanation:
As the expression given in the question be as follow .
= (x−3)( x²−4x−7)
simplify the above
= x (x²-4x-7)-3 (x²-4x-7)
Now open the bracket
= x³ - 4x² -7x - 3x² + 12x + 21
= x³- 4x²-3x²-7x + 12x + 21
= x³ -7x² + 5x + 21
Thus the simplification of the expression (x−3)( x^2−4x−7) is x³ -7x² + 5x + 21 .
Answer:
x=1
y=3
Step-by-step explanation:
y=-3x+6
y=-6x+9
replace y with y
-3x+6=-6x+9
combine like variables
3x=3
x=1
substitute 1 for x to get y
y= -3(1)+6
y=3
