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3 years ago

2. y = -x + 3x+y = -1how many solutions

Mathematics

1 answer:

hjlf3 years ago

7 0

Answer:

Step-by-step explanation:

y=-x+3

x+y=-1

y=-x+3

y=-x-1

-x+3=-x-1

add x to both sides

3=-1

no solutions

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If a certain cannon is fired from a height of 8.8 meters above the ground, at a certain angle, the height of the cannonball ab

Dennis_Churaev [7]

Answer:

It would take approximately 6.50 second for the cannonball to strike the ground.

Step-by-step explanation:

Consider the provided function.

$h(t)=-4.9t^2+30.5t+8.8$

We need to find the time takes for the cannonball to strike the ground.

Substitute h(t) = 0 in above function.

$-4.9t^2+30.5t+8.8=0$

Multiply both sides by 10.

$-49t^2+305t+88=0$

For a quadratic equation of the form $ax^2+bx+c=0$ the solutions are: $x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Substitute a = -49, b = 305 and c=88

$t=\frac{-305+\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}=-\frac{-305+\sqrt{110273}}{98}\\t = \frac{-305-\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}= \frac{305+\sqrt{110273}}{98}$

Ignore the negative value of t as time can't be a negative number.

Thus,

$t=\frac{305+\sqrt{110273}}{98}\approx6.50$

Hence, it would take approximately 6.50 second for the cannonball to strike the ground.

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2 years ago

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Nadusha1986 [10]

Answer:

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3 years ago

What is the slope of the line represented by the equation y = x – 3?

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<span>What is the slope of the line represented by the equation?
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3 years ago

Read 2 more answers

What is the value of W?

Kaylis [27]

Answer:

w=5

Step-by-step explanation:

firstly angle SUT and angle SUV are congruent, hence:

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2 years ago

PLEASE HELP, WILL MARK BRAINLIEST!<br><br> 7/9x +2 = 5/6

harina [27]

Answer:

Exact Form:

x= -3/2

Decimal Form:

x= -1.5

Mixed Number Form

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Step-by-step explanation:

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3 years ago

2. y = -x + 3x+y = -1how many solutions ​

2. y = -x + 3x+y = -1how many solutions