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zloy xaker [14]
3 years ago
9

What are the roots for 0=3x^2-4x-9

Mathematics
1 answer:
GarryVolchara [31]3 years ago
5 0
3x ^2 - 4x - 9 = 0
3x ^ 2 - 4x = 9
X( 3x - 4) = 9

X = 9

3x - 4 = 9
3x - 4 + 4 = 9 + 4
3x = 13
3x/3 = 13/3
X = 13/3.

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12t (that's the $12 for a shirt) + 25s (25 dollars for shorts) < (or equal too) 126
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t + s > (or equal too) 5

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8 0
3 years ago
Find b and then solve the equation:(b−5)x2−(b−2)x+b=0, if one of its roots is0.5
grigory [225]

Answer:

b = ⅓

x = ½, -1/7

Step-by-step explanation:

(b−5)x² − (b−2)x + b = 0

(b - 5)(0.5)² - (b - 2)(0.5) + b = 0

0.25b - 1.25 - 0.5b + 1 + b = 0

0.75b = 0.25

b = ⅓

(⅓−5)x² − (⅓−2)x + ⅓ = 0

(-14/3)x² + (5/3)x + 1/3 = 0

14x² - 5x - 1 = 0

14x² - 7x + 2x - 1 = 0

7x(2x - 1) + (2x - 1) = 0

(7x + 1)(2x - 1) = 0

x = 0.5, -1/7

4 0
4 years ago
Read 2 more answers
Work out the height of this triangle with base, b = 5.9mm and area, A = 149.27mm2.
AlekseyPX

Answer:

50.6

Step-by-step explanation:

50.6*5.9=298.54/2=149.27

5 0
3 years ago
The average of Manny's three tests is an 84. What must he get on a 4th test to raise his averageto a 87?
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90 because 84 plus 90 divided by 2 is 87.

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The correct answer is C) y + 5 = 2(x + 3)

In order to find this, simply take the point and the slope and plug into the base form of point-slope form.

y - y1 = m(x - x1)

Use the slope for m and the point for (x1, y1)

y + 5 = 2(x + 3)

7 0
3 years ago
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