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Rudik [331]
3 years ago
11

(2x – 3) (5x + 2) = ax2+ bx + c. What is the value of a - C+ b?

Mathematics
1 answer:
Leviafan [203]3 years ago
6 0

Answer:

b=3 c=2 :)

Step-by-step explanation:

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i think the answer is A

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Over a period of 12 hours, the temperature dropped 60 degrees. What was the average change in temperature in one hour?
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The altitude of a triangle is 2 m longer than its base. What are the dimensions of the altitude and the base if thearea of the t
HACTEHA [7]

Step-by-step explanation:

Let base of triangle be x m.

Therefore, altitude =( x + 2)m

area \: of \:  \triangle =  \frac{1}{2}  \times base \times altitude \\  \\ 40 =  \frac{1}{2}  \times x \times (x + 2) \\  \\ 80 =  {x }^{2} +2x \\  \\   {x}^{2}  + 2x - 80 = 0 \\  {x}^{2}  + 10x - 8x - 80 \\ x(x + 10) - 8(x + 10)  = 0\\ (x + 10)(x - 8) = 0 \\ x + 10 = 0 \:  \: or \:  \: x - 8 = 0 \\ x =  - 10 \:  \: or \:  \: x = 8 \\ base \: can \: not \: be \:  - ve \\ x \neq - 10 \\ x = 8 \\ x + 2 = 8 + 2 = 10 \\

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8 0
4 years ago
Kenji's electricity bill costs $21.56 per month plus $2.46 per kilowatt hour. How many kilowatt hours can he use and keep his bi
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Answer:

Kenjii can use 13.19 kilowatt-hour.

Step-by-step explanation:

Giving the following information:

Kenji's electricity bill costs $21.56 per month plus $2.46 per kilowatt-hour.

<u>First, we will structure the total cost formula:</u>

Total cost= 21.56 + 2.46*x

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32.44= 2.46x

13.19= x

Kenjii can use 13.19 kilowatt-hour.

5 0
3 years ago
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