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8_murik_8 [283]
3 years ago
14

Simplify: -5(3c-9) – 9c – 7c2 +5 What’s the answer?

Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0

Answer:

ANSWER: -7c^{2} -24c+50

Step-by-step explanation:

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7 0
3 years ago
Can someone help me with these questions and show work please and thank you
attashe74 [19]

Answer:

11. 78

12. 4x² - 3x - 1

Step-by-step explanation:

11. Sum of n whole numbers = ½(n² + n)

Multiply

½*n² + ½*n

= n²/2 + n/2

To find the sum of the first 12 whole number, substitute 12 for n into the equation.

= 12²/2 + 12/2

= 144/2 + 12/2

= 72 + 6

= 78

12. Area of trapezoid = ½(a + b)*h

Where,

a = 5x - 4

b = 3x + 2

h = x + 1

Area = ½(5x - 4 + 3x + 2)*(x + 1)

Area = ½(8x - 2)*(x + 1)

Area = ½[8x(x + 1) -2(x + 1)]

= ½[8x² + 8x - 2x - 2]

Add like terms

= ½(8x² - 6x - 2)

= ½(8x²) - ½(6x) - ½(2)

= 4x² - 3x - 1

6 0
3 years ago
(V. An aeroplane is flying parallel to the Earth's surface at a speed of 175 m/sec and at a height of 600 m. The angle of elevat
GREYUIT [131]

dot on top of earth = plane position at the time of observation (right one when 37°, left one 53°)

then the geometry is zoomed on the left side

4 0
3 years ago
What are the x-intercepts of this function?<br><br> g(x) = -0.25x2 − 0.25x + 5
musickatia [10]

Answer:

(-5,0) and (4,0)

x= -5 and x= 4

Step-by-step explanation:

6 0
2 years ago
What is the circumference of a circle whose diameter is 4.8 cm?
DaniilM [7]

Answer:

15.072

Step-by-step explanation:

Circumference =  πD

=  4.8π

=  15.079644737231

6 0
3 years ago
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