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Dafna1 [17]
3 years ago
12

Please help (picture) its due in an hour

Mathematics
2 answers:
Fofino [41]3 years ago
6 0

Answer:

a) \:  \: 6x - 8

b) \:    \: - 18 {x}^{2}  + 15

c) \:  \:  {x}^{4}  + 2  {x}^{3}  + 7 {x}^{2}

Step-by-step explanation:

a) \:  \: 2(3x−4) \\ 2(3x)+2(−4) \\ 6x+2(−4) \\ 6x−8

b) \:  \: −3(6 {x}^{2} −5) \\ −3(6 {x}^{2} )−3( - 5) \\  - 18 {x}^{2}  - 3( - 5) \\  - 18 {x}^{2}  + 15

c) \:  \:  {x}^{2} ( {x}^{2}   + 2x + 7) \\  {x}^{2}   {x}^{2}  +  {x}^{2} (2x) +  {x}^{2}  \times 7 \\  {x}^{4}  + 2 {x}^{2} x + 7 \times  {x}^{2}  \\  {x}^{4}  + 2  {x}^{3}  + 7 {x}^{2}

<h3>Hope it is helpful....</h3>
Tresset [83]3 years ago
5 0

Answer:

a) 6x-8

b) -18x^2-15

c) x^4+2x^3+7x^2

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When truckers are on long-haul drives, their driving logs must reflect their average speed. Average speed is the total distance
KengaRu [80]

Answer:

0.500 hour

Step-by-step explanation:

Givens

<em><u>Distance</u></em>

  • Total Distance on the highway = 3hr * 60 miles / hr = 180 miles
  • Distance in the city = 20 miles
  • Total Distance = 180 + 20 = 200 miles

<em><u>Time</u></em>

  • Time on the highway = 3 hours
  • Time in the city = x

Formula

d /t = r

Solution

  • Average rate = 57.14
  • Total Distance / Total Time = average rate
  • 200 / (3 + x) = 57.14                               Multiply both sides by 3 + x
  • 200 = 57.14 * (3 + x)                               Remove the brackets
  • 200 = 57.14*3 + 57.14x                           Multiply the factors on the right
  • 200 = 171.42 + 57.14x                              Subtract 171.42 from both sides.
  • 200 - 171.42 = 171.42 - 171.42 + 57.14x   So the subtraction
  • 28.58 = 57.14x                                         Divide by 57.14
  • 28.57/57.14 = x
  • x = 0.500 hour                                        Answer


3 0
3 years ago
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23. Which number below could not be used to<br><br><br> PLEASEE HELP!!
il63 [147K]
0.75 i think so lol HI
6 0
2 years ago
Heeeeeeeeeeeeeeeeeeeelllllppp​
adoni [48]

Answer:

120 degrees.

Step-by-step explanation:

All the angles in a triangle add up to 180. You have two of the angles given:

50 degrees and 70 degrees

To find the third angle of the triangle (BAC), use the expression:

180 - (50 + 70)

180 - 120

60

So, the third angle in the triangle is 60 degrees. Looking at angle DAB, you can see that it forms a straight line with angle BAC. A straight line is 180 degrees. Since we know BAC is 60, and BAC + DAB = 180, by doing 180 - 60, you can see that angle DAB is 120 degrees.

7 0
3 years ago
1. Given the triangle below, answer the following questions
bogdanovich [222]

Answer:

x=81

y=99

z= 129

Step-by-step explanation:

the 3 angles of a triangle add to 180 degrees

51 + 48 + x = 180

99 + x = 180

subtract 99 from each side

99 + x -99 = 180 -99

x = 81


x+y = 180  they make a straight line

81+ y = 180

subtract 81 from each side

y = 180-81

y = 99


z+ 51 = 180  they make a straight line

subtract 51 from each side

z+51-51 = 180 -51

z = 129

4 0
3 years ago
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Write an expression for the calculation triple 3 and then add double 8
Anvisha [2.4K]
(3 x 3) + (8 x 2) = ?
Using the order of operations you do what is inside the parentheses first, so multiplying the numbers, and then you add the products together.
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3 years ago
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