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diamong [38]
3 years ago
11

Solve the equation 8x^3+4x^2-18x-9= 0 algebraically for all values of x

Mathematics
1 answer:
solniwko [45]3 years ago
6 0
4x^2(2x+1)-9(2x+1)=0
(4x^2-9)(2x+1)=0
(2x-3)(2x+3)(2x+1)=0
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Write the augmented matrix for each system of linear equations.<br> 5x-2y=-6<br> -x+5y=15
lys-0071 [83]

Answer:x=0,y=3

Step-by-step explanation:

7 0
3 years ago
A customer buys a different book that has an original selling price of $38. The book is discounted 25%. The customer must pay a
Marina CMI [18]

Answer:

$30.21

Step-by-step explanation:

100% -25%= 75%

Discounted price of the book

= 75% ×$38

= $28.50

Since the customer must pay an additional 6% of the discounted price,

percentage of discounted price paid

= 100% +6%

= 106%

Total amount paid

= 106% × $28.50

= $30.21

_________________________________

Alternative working:

Original selling price= $38

Since the book is discounted 25%,

100% ----- $38

1% ----- $0.38

75% ----- 75 ×$0.38= $28.50

Since the sales tax is based on the discounted price, we let the discounted price be 100%.

100% ----- $28.50

1% ----- $0.285

106% ----- 106 ×$0.285= $30.21

∴ The total amount the customer pays for the discounted book is $30.21.

7 0
3 years ago
Can 10/5 be a whole number ?
Rus_ich [418]

Answer:

yes, 2

Step-by-step explanation:

10 over 5 is 2

2 is a whole number

3 0
4 years ago
Read 2 more answers
Can someone help me #11 PLEASE SHOW YOUR WORK
damaskus [11]
Since the triangle is equilateral, QR = RS = QS.
a. MS = (1/2)74
    MS = 37
b. Half of the equilateral triangle makes a right triangle. Use Pythagorean Theorem to find QM. 
a^2 + b^2 = c^2
37^2 + b^2 = 74^2
1369 + b^2 = 5476
subtract 1369 from both sides
b^2 = 4107
take the square root if both sides
b = 64.1
QM = 64.1
5 0
4 years ago
X/-4 -(-8)=12<br> 16<br> 80<br> -80<br> -16
MaRussiya [10]

Answer:

Brainleist!!!!!

Step-by-step explanation:

x/-4 + 8 = 12

x/-4 = 4

x = -16

4 0
3 years ago
Read 2 more answers
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