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3 years ago

-17 rational or irrational

Mathematics

2 answers:

grandymaker [24]3 years ago

8 0

Answer:

rational. it doesn't matter whether it's neg or pos because it's an integer.

guajiro [1.7K]3 years ago

3 0

Answer:

rational

Step-by-step explanation:

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If each side of a square grows 6 mm, the area of the square is multiplied by 16. How long are the sides of the original square

Phoenix [80]

Answer:

2 mm

Step-by-step explanation:

Let x be the sides of the original square,

then the area of the original square is x^2

The sides of the new square is x + 6

The area is (x + 6)^2

Then (x + 6)^2 = 16*x^2

Take square root on both sides and get

x + 6 = 4x,

3x = 6

so x = 2 mm

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2 years ago

I don’t understand this help

grigory [225]

Answer:

(1,1)(3,-2)

Step-by-step explanation:

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2 years ago

Read 2 more answers

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

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2 years ago

Please help. Algebra.

Arlecino [84]

Answer:

Step-by-step explanation:

4) C looks pretty good

5) D looks great

:) ask if you'd like to know how I figured that out

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2 years ago

there were 260 students enrolled in a school last year and 40 teachers employed by the same school. this year the number of stud

tatiyna

The percentage change would be 4%

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3 years ago