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Natali5045456 [20]
3 years ago
13

(HELP 10 POINTS) Find the difference. Write your answer in standard form.

Mathematics
2 answers:
Lesechka [4]3 years ago
7 0

-5x² -4x +8  

remove parentheses and collect terms.

 (-2x² +3) -(3x² +4x -5)

 = -2x² +3 -3x² -4x +5

 = (-2-3)x² -4x +(3 +5)

 = -5x² -4x +8

makkiz [27]3 years ago
4 0

9514 1404 393

Answer:

  -5x² -4x +8

Step-by-step explanation:

Eliminate parentheses and collect terms.

  (-2x² +3) -(3x² +4x -5)

  = -2x² +3 -3x² -4x +5

  = (-2-3)x² -4x +(3 +5)

  = -5x² -4x +8

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Yellowstone Lake, in Wyoming, is the largest high-altitude lake in North America, measuring 20 miles long and 14 miles wide. How
agasfer [191]

Answer:

6.67in long and 4.67in wide

Step-by-step explanation:

Given the amp of the scale 1 inch = 3 mi?

If the measured length is 20miles

Let x be the dimension of the length on the map

1 inch = 3 mi?

x = 20miles

3x = 20

x = 20/3

x = 6.67in

For the width,

Width =14miles

Let y be the dimension of the width on the map

1 inch = 3 mi

y = 14miles

3y = 14

y = 14/3

y = 4.67in

Hence the Yellowstone Lake appears 6.67in long and 4.67in wide on the Map

7 0
3 years ago
Write this trinomial in factored form 7y^2 + 25y + 12
netineya [11]

Answer:

(7y+4)(y+3)

Step-by-step explanation:

7y^2 + 25y + 12

7y^2+21y+4y+12

7y(y+3)+4(y+3)

(7y+4)(y+3)

4 0
3 years ago
Read 2 more answers
Ha: μ ≠ 30 we know that the sample standard deviation is 10 and the sample size is 70. for what sample mean would the p-value be
Andrew [12]

From the given problem the same size is n = 70. Df = n – 1 = 70 – 1 = 69.

The population mean is u = 30, sample standard deviation is s = 10 and the sample size is n = 70. Then,

t = x – u / s sqrt of n

1.995 = x – 30 / (10 sqrt of 70)

1.995 = x – 30 / 1.1952

X – 30 = 1.995 (1.1952)

X – 30 = 2.3844

X = 30 + 2.3844

X = 32.3844

 

The sample mean is 32.3844

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3 0
4 years ago
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Alona [7]

Answer:

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Step-by-step explanation:

3 0
3 years ago
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zysi [14]
50% of 14 is 7

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3 0
4 years ago
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