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DerKrebs [107]
3 years ago
9

Simplify 7n - 1 - 9n + 5

Mathematics
1 answer:
Bumek [7]3 years ago
8 0

Answer: the answer is -2n + 4

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A ladder 17 m long reaches a window 8 m high on one side of the road. the ladder is then turned over to the opposite side of the
Mademuasel [1]

Answer:

  • 23 m

Step-by-step explanation:

It is assumed the width of the street is the distance between the opposite buildings.

<em>See the picture attached</em>

<u>It comprises of two parts: </u>

  • x and y

<u>Using Pythagorean theorem, lets find the value of x:</u>

  • x² + 15² = 17²
  • x² = 289 - 225
  • x² = 64
  • x = 8 m

<u>Same rule for y:</u>

  • y² + 8² = 17²
  • y² = 289 - 64
  • y² = 225
  • y = 15 m

<u>The width of the street (road) is:</u>

  • 8 m + 15 m = 23 m

5 0
3 years ago
A test has 25 questions.
nadya68 [22]

Answer:

Peter missed five questions.

Step-by-step explanation:

Since the test has twenty-five questions, and Peter got 80% correct...

80/100 = __/25 <--What number is the numerator?

Well, to get from 100 to 25, you have to divide by 4. 100/4 = 25.

Now, what is 80/4? If you do the math, you should get 20.

25 (Total Questions) - 20 (Questions Correctly Answered) = 5 (Questions Incorrectly Answered)

6 0
3 years ago
The interest that cindy earns on her investment is given by the equation /=42t where t is the time in years that her money is in
Len [333]

Answer:


Equation is 42t

So,

t=12

According to equation

Put value of t

=42(12)

=504

So 2nd option is correct.

5 0
3 years ago
Jessica bought a soft drink for 2 dollars and 6 candy bars. She spent a total of 20 dollars. How much did each candy bar cost!
liq [111]

Answer:

4 dollars

Step-by-step explanation:

i subtracted the total money spend from the soft drink

18$ - 2$ = 16$ was spent in buying the candy bars

and she bought 4 candy bars so  we divide 16$ by 4 = 4$ for each candy bars

7 0
3 years ago
Help rhis is geometry
Makovka662 [10]

Answer:

They are not congruent

Step-by-step explanation:

6 0
4 years ago
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