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4 years ago

I need help and plz show your work

Mathematics

1 answer:

nasty-shy [4]4 years ago

8 0

Answer:

Step-by-step explanation:

the question says that distance is directly proportional to time walked,

.: s alpha t

s = kt [k for proportionality]

A/Q

1.5 = k × 13.5

k = 1.5/13.5

k = 1/9

IInd

2=1/9 × t

t= 2×9=18

IIIrd

4.5=1/9 × t

t= 4.5×9=40.5

t=40.5

IVth

5=1/9 × t

t=5×9

t=45

s. t

1.5 13.5

2 18

4.5 40.5

5 45

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4 years ago

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Step-by-step explanation:

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3 years ago

I need help now plz

Romashka-Z-Leto [24]

Answer:

Step-by-step explanation:

The picture is a bit blurry, but from what i can see, i'd say C (whichever one has -4 x 3 x 1 under the square root.)

So for this, you need to know the quadratic formula, which is:

$\frac{-b ± \sqrt{b^{2} -4ac} }{2a}$

*ignore the weird capital A, it keeps coming up when i try to use the ± symbol

They have given you the equation of a quadratic, so the first thing you have to do is rearrange it, so that $x^{2}$ comes first.

So now we have the equation: 3 $x^{2}$  - 2x +1

*the quadratic formula uses a, b and c, but they are specific. a is always the coefficient of $x^{2}$ , b is always the coefficient of x and c is always the constant (number without an x)

So, i can find that, in this case:

a = 3 b= -2 c=1

Now substitute each of those values it into the original quadratic equation:

$\frac{-(-2) ± \sqrt{(-2)^{2} -4(3)(1)} }{2(3)}$

*again, ignore the weird capital A.

That's how you find the answer, which from what i can tell in the picture is C.

Hope that helped : )

6 0

3 years ago

2. Convert the following from standard form to vertex form: g(x) = -5t2 - 10t + 15

Naya [18.7K]

Answer: y = -5(x+1)^2+20

Step-by-step explanation: I haven't done any math in a long time so take this with a grain of salt but they were equivalent on the calculator.

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3 years ago

Can u fast give me the answer for this fast pleas

Rufina [12.5K]

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3 years ago