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Dmitrij [34]
3 years ago
10

PLEASE HELP IM BEGGING YOU PLEASE I also need work shown

Mathematics
1 answer:
Oksanka [162]3 years ago
3 0

Answer:

x=3

y=-4

Step-by-step explanation:

\left \{ {{y=2x-10} \atop {y=-3x+5}} \right. \\\left \{ {{2x-10=-3x+5} \atop {y=-3x+5}} \right. \\\left \{ {{5x=15} \atop {y=-3x+5}} \right. \\\left \{ {{x=3} \atop {y=-3*3+5}} \right. \\\left \{ {{x=3} \atop {y=-4}} \right.

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Jeremiah read 5/6 a book in 2/3 an hour. How much can he read in an hour?
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Answer:he can read 1 and 3/12 or 15/12 books in an hour.

Step-by-step explanation:

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2 years ago
Coefficient of x^2 in the expansion of (x-3)^3
Mila [183]

Answer:

-9

Step-by-step explanation:

(x-3)(x-3)(x-3)

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7 0
3 years ago
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The following graph describes function 1 and the equation below it describes function 2:
Tanya [424]
Function 1: 
f(x) = -x² + 8(x-15)f(x) = -x² <span>+ 8x - 120
Function 2:
</span>f(x) = -x² + 4x+1
Taking derivative will find the highest point of the parabola, since the slope of the parabola at its maximum is 0, and the derivative will allow us to find that.
Function 1 derivative: -2x + 8 ⇒ -2x + 8 = 0 ⇒ - 2x = -8 ⇒ x = -8/-2 = 4

Function 2 derivative:  -2x+4 ⇒ -2x + 4 = 0 ⇒ -2x = -4 ⇒ x = -4/-2 ⇒  x= 2
Function 1: f(x) = -x² <span>+ 8x - 120 ; x = 4
f(4) = -4</span>² + 8(4) - 120 = 16 + 32 - 120 = -72
<span>
Function 2: </span>f(x) = -x²<span> + 4x+1 ; x = 2
</span>f(2) = -2² + 4(2) + 1 = 4 + 8 + 1 = 13

Function 2 has the larger maximum.
8 0
3 years ago
A=244in2<br> H=<br> B=12.6in<br> (1in=2.54cm)
pshichka [43]
Although there is no picture, I will assume this is a triangle we are talking about since the terms base and height are being used. If that is the case, the height is roughly 38.72in. 

To find this, we will use the area of a triangle formula. 

1/2bh = a ---> plug in known values. 
1/2(12.6)(h) = 244 ---> multiply to simplify
6.3(h) = 244 ----> divide both sides by 6.3
h = 38.73
6 0
3 years ago
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