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2 years ago

9

The speed (S) an object falls varies directly with time. If the speed is 49.0 m/s after 5 seconds, then what is the speed after

3 seconds?

1 answer:

Lady bird [3.3K]2 years ago

8 0

Answer:

not sure

Step-by-step explanation:

i dunno

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Pls help, easy geometry question

Lemur [1.5K]

x^2 + y^2 + 2x - 6y + 1 = 0

x^2 +2x + 1 + y^2 - 6y = 0

x^2 + 2( x × 1) + 1^2 + y^2 - 2(y×3) + 3^2 -3^2 =0

(x+1)^2 + (y-3)^2 = 3^2

comparing with circle equation

(x-a)^2 + (y - b)^2 = r^2

where (a , b) is centre of circle.

so we get center of circle is

(-1, 3)

3 0

2 years ago

Read 2 more answers

Factor the following equations to find the zeros of the equation.

irina1246 [14]

The zeroes of the equation are (1,4)

Step-by-step explanation:

Given equation is:

$y = x^2 - 5x + 4$

We have to put y=0 in the equation to find zeroes of the equation

$x^2-5x+4 = 0\\x^2 - 4x- x +4 = 0\\x(x-4)-1(x-4) = 0\\(x-4)(x-1) = 0\\x - 4 =0 => x = 4\\x-1 = 0 => x = 1$

Hence,

The zeroes of the equation are (1,4)

Keywords: Equation, zeroes of an equation

Learn more about zeroes of equation at:

#LearnwithBrainly

4 0

3 years ago

Pilar is playing with a motorized toy boat. She puts the boat in a lake and it travels 400m at a constant speed. On the way back

ankoles [38]

Answer:

The trip normally takes 8 minutes

Step-by-step explanation:

The given information states that the away distance the boat traveled = 400 m

The time traveled at the same initial speed , v₁, by the boat on the way back = 2 minutes

The increase in speed of the boat by Pilar = 10 m/min

The new speed, v₂ = v₁ + 10

The time for the return trip, t₂ = 60 seconds (1 minute) faster than time for the trip, t₁

t₂ = t₁ - 1

Therefore we have;

v₁ × t₁ = v₁×2 + v₂×(t₂-2) = 400

v₁×2 + (v₁ + 10)×(t₂-2) = 400

(v₁ + 10)×t₂ - 20 = 400

But v₁ = 400/t₁ = 400/(t₂ + 1)

Which gives;

(400/(t₂ + 1) + 10)×t₂ - 20 = 400

10×(t₂²+ 36·t₂-2)/(t₂+1) = 400

10·t₂²+ 10·t₂-420 = 0

t₂²+ t₂-42 = 0

(t₂ - 7)(t₂ + 6) = 0

t₂ = 7 minutes or -6 minutes

Given that t₂ is a natural number, we have, t₂ = 7 minutes

Whereby, t₂ = t₁ - 1, we have;

7 = t₁ - 1

t₁ = 1 + 7 = 8 Minutes

The trip normally takes 8 minutes

3 0

3 years ago

Tuesday’s attendance was 70% of Monday’s attendance, 50. What was Tuesday’s attendance?

lara [203]

Answer:

35

Step-by-step explanation:

100 / 50 = 2

70 / 2 = 35

3 0

2 years ago

What is the answer to (x + 7) + 3y

Oduvanchick [21]

Answer:

4y+7

Step-by-step explanation:

there is no way of knowing what y is

3 0

3 years ago