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jeyben [28]
3 years ago
9

Write and algebraic expression:

Mathematics
1 answer:
Triss [41]3 years ago
6 0

Answer:

21b

Step-by-step explanation:

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What are the zeros of the function?
cluponka [151]

The function is:

f ( x ) = x² - x - 72

This is a quatdratic function. So we can find the zeroes of the function with the formula:

x 1/2 = ( - b +/- √(b² - 4 ac) ) / ( 2a )

And we have: a = 1, b = - 1 and c = - 72

x 1/2 = ( 1 +/- √((-1)² - 4 · 1· ( - 72 )) ) / 2

x 1/2 = ( 1 +/- √( 1 + 288 ) ) / 2

x 1/2 = ( 1 +/- √289 ) / 2

x 1/2 = ( 1 +/- 17 ) / 2

x 1 = ( 1 - 17 ) 2 = - 16 / 2 = - 8

x 2 = ( 1 + 17 ) / 2 = 18 / 2 = 9

Answer: The zeroes are - 8 and 9.

7 0
3 years ago
Find the value of (2^−2 − 4^0) × 4^−2​
Dafna1 [17]

Answer:

-0,046875

Step-by-step explanation:

( {2}^{ - 2}  -  {4}^{0} ) \times  {4}^{ - 2}  \\  = (0.25 - 1) \times 0.0625 \\  =  - 0.75 \times  0.0625 \\  =  - 0.046875

8 0
2 years ago
Read 2 more answers
A first number plus twice a second number is 9. Twice the first number plus the second totals 27. Find the numbers
SOVA2 [1]
Create a a system of 2 equations: 2x + y = 27 and 2y + x = 9, with x being the first number and y being the second. solve for the two variables and you'll get the first number is 15 and the second is -3.
6 0
3 years ago
Please help what’s 6,7,8.
Nikitich [7]

Answer: 7 is 1/8, 8 is 2/8 or 1/4

Step-by-step explanation:

7 0
3 years ago
What is 100 divided by 6
iren2701 [21]
100/6 = 16.66 rounds to 16.7
6 0
3 years ago
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