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Paladinen [302]
2 years ago
7

Solve the equation 9x² – 29x – 28 = 0 Give your answers to 2 decimal places when appropriate

Mathematics
1 answer:
andrew-mc [135]2 years ago
4 0

Answer:

x = 4 or x = 0.78

Step-by-step explanation:

9x² – 29x – 28 = 0

2 roots: x = ((-(-29) ± √(-29)² - 4 x 9 x (-28)) / (2 x 9)

               = (29 ± √841 + 1008) / 18

               = (29 ± 43) /18

x = 72 /18 = 4     or

x = -14 /18 = - 0.78

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Answer:  15,375 inches

Step-by-step explanation: If there are 123 inches in each group, and there are 125 groups, it is a multiplication operation.

123 × 125 =  15375

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6 0
2 years ago
Margarita traces a circle with a radius of 20 centimeters like the one shown below. She will color in the shaded region. What is
lana66690 [7]

Answer:

314 cm ^ 2

Step-by-step explanation:

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3 years ago
How do you find the radius when volume is given for cylinder,Cone,Hemisphere,Sphere
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7 0
3 years ago
Help on this one as well ii manged to get an answer but If you understand it or im wrong an you please explain ! thank you !!
AnnZ [28]
Almost got it!

x + 3 = 3(y + 2)/2 [Multiplied both sides by 3]
so x + 3 = (3y + 6)/2
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2x + 6 = 3y + 6
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So you wrote y/3 instead of y/2 
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8 0
2 years ago
Read 2 more answers
Descompuneti in factori. x^2+4x-5=?
Lapatulllka [165]
<span>Assume that,
   x^2+4x-5 = 0 .......(1)
       Then, x^2+4x-5 = 0 x^2+5x-1x-5 =0
   x(x+5)-1(x+5) = 0
    (x+5) (x-1) = 0
       We get x=-5 and x=1
       Sub x=-5 in equ (1)
   (-5)^2+4(5)-5 = 0
     -25+20-5 = 0
    -25+25= 0
    0 = 0
       Sub x=1 in equ (1) (1)^2+4(1)-5 = 0
    1+4-5 = 0 5-5 = 0
     0 = 0
       Therefore x value is -5 and 1</span>
3 0
3 years ago
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