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SpyIntel [72]
2 years ago
15

PLZ HELP FOR BRAINLEST ANSWER!!!! ANSWER BOTH FOR 15 POINTS!!!!

Mathematics
2 answers:
gavmur [86]2 years ago
8 0

a; x = y divided by two

b;y = 6

Paladinen [302]2 years ago
5 0

Answer:

y=(-8x)

Second Part: y=24 when x is -3

Step-by-step explanation:


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What is the value of a(b - c) when b = 3, c = -3 and a = -2?​
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have a nice day:)

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3 years ago
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A water balloon is 5 feet above the ground when Sally launches it into the air. Use the quadratic equation 0 = -t^2 + 4t + 5 to
rodikova [14]

Answer:

t=5\ sec

Step-by-step explanation:

we have

-t^{2} +4t+5=0

Solve the quadratic equation to find the zero's or x-intercepts

Remember that

The x-intercepts are the values of x when the value of y is equal to zero ( water balloon reach the ground)

we know that

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-t^{2} +4t+5=0

so

a=-1\\b=4\\c=5

substitute in the formula

t=\frac{-4(+/-)\sqrt{4^{2}-4(-1)(5)}} {2(-1)}

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3 years ago
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