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klasskru [66]
3 years ago
6

(20 POINTS!!!) Richie and his brother have a paper route. Together they can deliver all of the papers in 40 minutes, and Richie

can do it alone in 90 minutes. Richie’s brother slept in one day, leaving Richie to deliver alone for 30 minutes. How long must the two of them work together to finish delivering the newspapers?
Mathematics
1 answer:
Ann [662]3 years ago
7 0

Simplify equation:     14 - 7y + 5 = 1 + 3y + 24

     simplify again:  19 - 7y = 25 + 3y

     add -25  and 7y to both sides:   -6 = 10y

     y = -6/10   or -0.6

2.  After 30 minutes, richie has delivered 1/3 of the papers, so they have to deliver the remaining 2/3.  Since they can deliver them all in 40 minutes, would the answer be 2/3 of 40?  I'm not sure about this.

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You are given triangle RST with vertices R(-3,-1), S(-1,-1) and T(-4,-5).

1. Apply the rotation of 90° counterclockwise about the origin that has a rule:

(x,y)→(-y,x).

Then

  • R(-3,-1)→R''(1,-3),
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2. Second transformation is translation 1 unite up with a rule:

(x,y)→(x,y+1).

So

  • R''(1,-3)→R'(1,-2);
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As you can see these points are exactly those from the task condition.

Answer: 1st transfomation is rotation of 90° counterclockwise about the origin and 2nd transformation is translation 1 unite up

7 0
4 years ago
The Robot Factory is a learning center where children can build robots. The project fee per visit is $18, and each hour of time
ipn [44]
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5 0
4 years ago
At a point on the ground 46 feet from the foot of a tree, the angle of elevation of the top of the tree is 68 degrees. What is t
Mandarinka [93]

Answer:

114 ft

Step-by-step explanation:

Imagine or construct a right triangle with the 46 ft leg lying on the ground.  This is the "adjacent side" of the triangle; it lies immediately adjacent to the 68 degree angle.  The side opposite this angle is h, the height of the tree.

The tangent function includes angle, opp side and adj side:

tan 68 degrees = opp / adj = h / (46 ft), and so:

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6 0
3 years ago
What is 3x+1? They say its really easy and I don't know how.
posledela

-------------------------------------------------------------------------------------------------------------

Answer:  \textsf{x = - 1 / 3}

-------------------------------------------------------------------------------------------------------------

Given: \textsf{3x + 1}

Find: \textsf{The value of the unknown variable x}

Solution: In order to solve for x we need to isolate it with the first step being to subtract 1 from both sides and then we would divide both sides by 3 to give us the solution.

<u>Subtract 1 from both sides</u>

  • \textsf{3x + 1 = 0}
  • \textsf{3x + 1 - 1 = 0 - 1}
  • \textsf{3x = 0 - 1}
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<u>Divide both sides by 3</u>

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Therefore, the final answer would be that x is equal to -1/3.

5 0
2 years ago
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