Answer: 375
Step-by-step explanation:
You need to multiply the cost of each notebook by how many notebooks the store wants to buy.
Answer:
2x + y = 3 => y = 3-2x
then
4x+4(3-2x) = 8
4x+12-8x= 8
-4x = -4
x=1
y=3-2*1 = 1
Step-by-step explanation:
Answer:
Step-by-step explanation:
hope this helps
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Answer:
60
Step-by-step explanation:
x/80 * 75/100
100x= 6000
/100 /100
x=60
Answer:
C. -3 must be a root of the polynomial 2·x² + 9·x + 9
Step-by-step explanation:
Given that the remainder when (2·x² + 9·x + 9) is divided by (x + 3) equals zero, then (x + 3) is a factor of 2·x² + 9·x + 9 and -3 is a root of the polynomial
Explaining by using the long division of the polynomial is presented as follows;
<u>2·x + 3</u>
(2·x² + 9·x + 9)/(x + 3)
<u>- (2·x² + 6·x)</u>
3·x + 9
-(3·x + 9)
0
Therefore, (2·x + 3) × (x + 3) = 2·x² + 9·x + 9
The solution of the 2·x² + 9·x + 9 = 0 gives the root of the polynomial
The root is given by, 2·x² + 9·x + 9 = (2·x + 3) × (x + 3) = 0
Therefore, the roots are;
2·x = -3 or x = -3/2 and x = -3
Therefore;
-3 must be a root of the polynomial 2·x² + 9·x + 9.