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storchak [24]
3 years ago
9

Solve by factorising x^{2} + 8x + 15 = 0

Mathematics
2 answers:
AVprozaik [17]3 years ago
8 0
(x+5) (x+3)

x^2 = (x+?) (x+?)
8x+15= 5&3
8x= 5•3
15= 5+3
Andre45 [30]3 years ago
8 0

Answer:x=-3 , x=-5

Step-by-step explanation:

(x+3)*(x+5)=0

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Step-by-step explanation:

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4 0
3 years ago
A cannon ball is launched at 6 feet per second from the top of a platform 12 feet above the ground.
AleksAgata [21]
A.) y = ut - 1/2gt^2 + 12
y = 6t - 1/2(9.8)t^2 + 12
y = 6t - 4.9t^2 + 12

b.) The y-intercept is 12

c.) The y-intercept represent the height of the ball at time t = 0

d.) At the time the ball reaches the ground, y = 0
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Therefore, it took the ball 2.29 seconds to reach the ground.
7 0
3 years ago
Sweets cost 6p how much would 43 sweets cost?
SCORPION-xisa [38]
The answer is 258 pennies
7 0
3 years ago
Write the function in vertex form, and identify its vertex. g(x) = 5x2 - 50x + 128
steposvetlana [31]
Hello : 
<span>g(x) = 5x² - 50x + 128    
       = 5(x²-10x +128/5)
       = 5 (x²-10x+5²-5² +128/5)
        = 5 ((x-5)² +128/5 -125/5)
y = 5 ((x-5)² - 3/5)
y= 5(x-5)² +3.....vertex form
the vertex is : (5,3)</span>
3 0
3 years ago
25 pts
Solnce55 [7]

Answer:

490lbs.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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