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mestny [16]
3 years ago
5

Alina has just recieved 3 video games for her birthday to add to her existing 12 video games. A week later she went to the thrif

t store and doubled her video games. Another week she bought 5 more games what's the numerical expression for the total amount of video games alina has now
Mathematics
1 answer:
Papessa [141]3 years ago
3 0
Let the existing no. of video games she had be x,
then 
(3+x)+2x+5

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Can someone help me with (a) and (c)? Thanks! ;D
BaLLatris [955]

Answer:

Step-by-step explanation:

a) Mark any two points in line a

(0,7)  ; (5,-3)

Find the slope

slope = y2 - y1 /x2-x1

=\frac{-3-7}{5-0}\\\\=\frac{-10}{5}\\\\=-2

Equation: y-y1 = m(x-x1)

y - 7 = -2(x - 0)

y - 7 = -2x

y = -2x + 7    --------> line a

c) equation of line b

(2,-1);  slope = -2  {as b line is parallel to line a}

y - y1 =m(x-x1)

y -(-1) = -2*(x - 2)

y + 1 = -2x - 2*-2

y + 1 = -2x + 2

y = -2x + 2 -1

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5 0
2 years ago
Martin is offered an investment where for $6,000 ​today, he will receive $6,180 in one year. He decides to borrow $6,000 from th
nirvana33 [79]

Answer:

The correct answer is D. 3 % p. a .

Step-by-step explanation:

For the investment offered, Martin is supposed to get $180 as an interest ($6,180 - $6,000).

Now Martin is borrowing $6,000 from the bank to make this investment. He should be charged $180, so that he breaks even on investment.

Thus using the formula:

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⇒ 180 = \frac{6000}{100} × 1 × Interest rate

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⇒ Interest rate = 3

Thus the correct answer is 3% per annum.

3 0
3 years ago
Can someone help with this???
sineoko [7]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
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Salsk061 [2.6K]

Answer: In June 2097

Step-by-step explanation:

According to the model, to find how many years t should take for  P(t)=21100 we must solve the equation  0.9t^2+6t+14000=21100. Substracting 21100 from both sides, this equation is equivalent to 0.9t^2+6t-7100=0.

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The value of t is approximately 85 and a half years and the initial time of this model is the January 1, 2012. Adding 85 years to the initial time gives the date  January 2097, and finally adding the remaining half year (six months) we conclude that the date is June 2097.

6 0
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30:18,
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