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3 years ago

PLZ ANSWER PLZ HELP ME

Mathematics

1 answer:

Nadya [2.5K]3 years ago

5 0

The answer to the question is b

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What is the square root of 98/2

timurjin [86]

Answer:

Step-by-step explanation:

$\sqrt{ \frac{98}{2} } = \sqrt{49 } = 7$

I hope it helped you

8 0

1 year ago

Luisa is a deep-sea diver. Today she descended to a depth below -21 feet. What phrase describes the distance of Luisa’s dive?

Bingel [31]

Answer:

its B

Step-by-step explanation:

she went deeper than 21 feet so greater than 21

8 0

2 years ago

Amelia launched her science fair rocket, and then backed away. The path of the rocket is given by the equation below, where y is

Mamont248 [21]

Answer:

1)The rocket hit the ground at $x = \frac{5}{4}$

2)The maximum height of the rocket = 12.468 feet

Step-by-step explanation:

Step(i):-

Given equation

y = -2 x² + 5 x + 7 ...(i)

Differentiating equation (i) with respective to 'x' , we get

$\frac{dy}{dx} = -2( 2x) +5(1) = -4x +5$

Equating zero

$\frac{dy}{dx} = 0$

⇒ -4 x +5 =0

⇒ -4 x = -5

⇒ $x = \frac{5}{4}$

The rocket hit the ground at $x = \frac{5}{4}$

Step(ii):-

$\frac{dy}{dx} = -4x +5$ ...(ii)

Again differentiating equation (ii) with respective to 'x' , we get

$\frac{d^{2} y}{dx^{2} } = - 4(1)$

The maximum height at x = $\frac{-5}{4}$

y = -2 x² + 5 x + 7

$y = -2 (\frac{5}{4})^{2} + 5 (\frac{5}{4} ) + 7$

$y = \frac{-2(25)+ 25 (16)+7(64)}{64}$

$y = \frac{798}{64} = 12.468 feet$

The maximum height of the rocket = 12.468 feet

4 0

2 years ago

So whats the answer.

Neko [114]

Answer:

Step-by-step explanation:

5 0

3 years ago

Solve by completing the square:X^2+6x-12=0

Ira Lisetskai [31]

X² + 6x -12 = 0
x = -(6) +/- √((6)² - 4(1)(-12))
 2(1)
x = -6 +/- √(36 + 48)
 2
x = -6 +/- √(84)
 2
x = -6 +/- 2√(21)
 2
x = -3 + √(21)
x = -3 + √(21) x = -3 - √(21)

5 0

3 years ago