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kvasek [131]
4 years ago
12

Please help I need to them all

Mathematics
1 answer:
Aliun [14]4 years ago
5 0

Answer:

Step-by-step explanation:

1). 6x + 7 - 18x + 4

  = (6x - 18x) + (7 + 4)

  = -12x + 11

2). 5x - 7x + 5x + 4 - 9

  = (5x + 5x - 7x) + (4 - 9)

  = 3x - 5

3). 3x + 8y - 5x + 3y

  = (3x - 5x) + (8y + 3y)

  = -2x + 11y

4). 17x² - 7x²- 5x + 3x + 14

  = (17x² - 7x²) + (-5x + 3x) + 14

  = 10x² - 2x + 14

5). 3xy - 9xy - 5x + 4x - 7 + 3

  = (3xy - 9xy) + (-5x + 4x) + (-7 + 3)

  = -6xy - x - 4

6). 9x + 7y - 15x + 4x - 9y

  = (9x - 15x + 4x) + (7y - 9y)

  = -2x - 2y

7). 3x + 7 - 5x - 8y + 4x - 2y + 7

  = (3x - 5x + 4x) + (-8y - 2y) + 14

  = 2x - 10y + 14

8). 3xy - xy + 15x + 4 - 11

  = (3xy - xy) + 15x + (4 - 11)

  = 2xy + 15x - 7

9). -8x + 3x + 7y - 5x + 4y - 2

  = (-8x - 5x + 3x) + (7y + 4y) - 2

  = -10x + 11y - 2

10). 3x² + 6x - 3y + 2x - 7

  = 3x² + (6x + 2x) - 3y - 7

  = 3x² + 8x - 3y - 7

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Answer:

a. 1,000 trees

b. 3,250 trees

Step-by-step explanation:

a. How many trees will they plant during the fifth year?

b. How many trees will they have planted by the end of the tenth year?​

Using the sum of an arithmetic progression formula

Sn = n/2 {2a+(n-1)d}

Where,

Sn = Sum of an n terms

n = number of terms

a = first term

d = common difference

a.

n = 5

a = 100

d = 50

S5 = n/2 {2a+(n-1)d}

= 5/2 {2*100 + (5-1)50}

= 5/2 {200+(4)50}

= 5/2{200 + 200}

= 5/2(400)

= 2,000 / 2

= 1,000

S5 = 1,000 trees

b. Sn = n/2 {2a+(n-1)d}

n = 10

a = 100

d =50

S10 = 10/2{2*100 + (10-1)50}

= 5{200 + (9)50}

= 5{200 + 450}

= 5(650)

= 3,250

S10 = 3,250 trees

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3 years ago
Is the area of a desk more likely to be 8 square feet or 8 square inches? explain​
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iVinArrow [24]

The statement that are true about the function and its graph is "The graph of the function is a parabola " , the correct option is (b) .

In the question ,

it is given that ,

the quadratic function is f(x) = x² – 5x + 12 .

for x = -10 ,

f(-10) = (-10)² – 5(-10) + 12

= 100 + 50 + 12

= 162

option(a) is false .

the graph of the quadratic function is shown below .

form the graph we can see that the graph is a parabola ,

and the function opens upwards ,

the graph does not contain the points (20,-8) and (0,0)

Therefore , The statement that are true about the function and its graph is "The graph of the function is a parabola " , the correct option is (b) .

The given question is incomplete , the complete question is

Consider the quadratic function f(x) = x² – 5x + 12. Which statement is true about the function and its graph?

(a) The value of f(–10) = 82

(b) The graph of the function is a parabola.

(c) The graph of the function opens down.

(d) The graph contains the point (20, –8).

(e) The graph contains the point (0, 0).

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1 year ago
E. Sandy’s monthly bank statement showed the following deposits and withdrawals: -$14.10, $41.50, -$11.03, -$7.25, $83.22 If San
storchak [24]

Answer:

$149.09

Step-by-step explanation:

56.75-14.10=42.65

42.65+41.50=84.15

84.15-11.03=73.12

73.12-7.25=65.87

65.87+83.22=149.09

5 0
3 years ago
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