3 years ago

Someone help asap!!! Will give brainlist :)

Mathematics

1 answer:

KatRina [158]3 years ago

5 0

Answer:

$a) \: constant \: of \: proportionality \: (k) \\ = \frac{90}{2} \\ = 45 \\ \\ b) \: \frac{distance}{time} = k \\ \therefore \: \frac{d}{t} = k \\ \\ c) \: \frac{d}{t} = k \\ \\ \therefore \: d = tk$

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Why is How many continentS are there ?" not a statistical queston Othere is only one answer the answer is unknown1 Othe answer i

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Step-by-step explanation:

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3 years ago

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I need help pls and thank you

Aleks [24]

The fourth table is the correct answer

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2 years ago

In physics, if a moving object has a starting position at so, an initial velocity of vo, and a constant acceleration a, the

emmasim [6.3K]

Answer:

$a=\frac{2S -2v_ot-2s_o}{t^2}$

Step-by-step explanation:

We have the equation of the position of the object

$S = \frac{1}{2}at ^2 + v_ot+s_o$

We need to solve the equation for the variable a

$S = \frac{1}{2}at ^2 + v_ot+s_o$

Subtract $s_0$ and $v_0t$ on both sides of the equality

$S -v_ot-s_o = \frac{1}{2}at ^2 + v_ot+s_o - v_ot- s_o$

$S -v_ot-s_o = \frac{1}{2}at ^2$

multiply by 2 on both sides of equality

$2S -2v_ot-2s_o = 2*\frac{1}{2}at ^2$

$2S -2v_ot-2s_o =at ^2$

Divide between $t ^ 2$ on both sides of the equation

$\frac{2S -2v_ot-2s_o}{t^2} =a\frac{t^2}{t^2}$

Finally

$a=\frac{2S -2v_ot-2s_o}{t^2}$

5 0

3 years ago

) Fred buys a video game disk for $4. There was a discount of 20%.What is<br> the sales price?

dolphi86 [110]

Answer:

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2 years ago

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hichkok12 [17]

X=price of one jumbo popcorn
y=price of one chocolate chip cookies

$5.00=$5.00(100 cts / $)=500 cts
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We suggest this system of equations:

x+2y=500
x+4y=600

we solve this system of equations by reduction method.

-(x+2y=500)
x+4y=600
----------------------
2y=100 ⇒ y=100/2=50

x+2y=500
x+2(50)=500
x+100=500
x=500-100
x=400

solution: one chocolate chip cookie cost 50 cts.

4 0

3 years ago