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ahrayia [7]
3 years ago
10

What quadratic has roots x=8 and x= -5

Mathematics
1 answer:
Alona [7]3 years ago
5 0

Answer:

So the correct option is X squared -3 X +40

Step-by-step explanation:

If a polynomial has roots x=8 and x=-5, then we know that the factorized form is:

(x-8)(x+5)

So, to find the polynomial we need to expand the polynomials:

(x-8)(x+5) = (x^2 +5x - 8x + 40) = x^2 -3x + 40

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Amir buys a new car for £16470. The value of the car will depreciate by 2% each year. Work out how much amir's car will cost aft
Ronch [10]

Answer:

Amir's car will cost £10348.88 after 23 years.

Step-by-step explanation:

I finally found a UK human!

This is compound interest so you have to find a decimal multiplier and multiply that with £16470 to the power of 23.

The decimal multiplier would be 0.98. This is because you do 100% - 2% as depreciating basically means a decrease, which gives you 98% and then you divide that by 100 to get your decimal multiplier - 0.98.

16470 × 0.98^{23} = £10348.88

I hope that helps you!! ^-^

7 0
3 years ago
The ages of the members of a gym have a mean of 4747 years and a standard deviation of 1111 years. what can you conclude from​ c
Bond [772]

Chebyshev came up with the limits on how much or how many of the data must lie close to the mean. In specific for any positive k, the proportion of the data that lies within k standard deviations of the mean is at least: <span>

1 - 1/k² 

<span>In this problem  the mean is 47 yrs therefore:

(47 – 17.3) = 29.7 = (76.7 - 47) </span></span>

The value of k is calculated using the formula:<span>

29.7 / 11 = 2.7 = k</span>

So the % of gym members aged between 19.4 and 76.6 is: <span>

1 - 1 / (2.6)² = 0.863 = 86.3 %</span>

 

<span>Therefore 86.3% of the gym members are aged between 19.4 and 76.6</span>

5 0
4 years ago
Mike got in and elevator and whent down 3 floors. he meant to go to a lower level,so he stayed on the elevator and when down 3 m
Naily [24]
It is negative six because down three is -3 so 3+3 =6 but the numbers are negative so the answer is -6
7 0
4 years ago
C=5/9(F-32) solve for F
mina [271]
<span>F= 9/5 C + 32
      or
</span><span>F= 9/5(C+32)
</span>                          Hoped this helped:)
7 0
3 years ago
PLEASE PLEASE PLEASE HELP!!!!!!!!!!!!!!! Monsters, Inc. has been Accident Free for 47 days out of 365. What percentage of days h
givi [52]

Answer:

12.8767123288% so maybe 12.9

Step-by-step explanation:


5 0
3 years ago
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