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olga nikolaevna [1]
2 years ago
15

Easy math for smart people problem: 5(2d+4)=35

Mathematics
1 answer:
Likurg_2 [28]2 years ago
6 0

Answer:

3/2 (decimals): 1.5

Step-by-step explanation:

1. 5(2d+4)=35 -> multiply 5 to (2d+4)

2. 10d + 20 = 35

3. Subtract 20 by both sides

10d = 35-20

10d = 15

4. divide 10 by both sides

d = 15/10

d = 3/2

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The table below represents a function. Which of the following equations could be its function rule? PLS HELP!!
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Answer:

  y = -3x

Step-by-step explanation:

It is easiest to try the answers for x=1.

  a) y = 1/-3 = -1/3 ≠ -3

  b) y = 1 ≠-3

  c) y = 3(1) = 3 ≠ -3

  d) y = -3(1) = -3 . . . . . this rule matches the table

8 0
2 years ago
A waterfall has a height of 1900 feet. A pebble is thrown upward from the top of the falls with an initial velocity of 12 feet p
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Answer:

Step-by-step explanation:

h is the height of the pebble after a certain amount of time has gone by. Since we are told to find that time when the pebble is on the ground, we say that h = 0 since the height of something on the ground has no height at all. Then factor the quadratic.

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7 0
3 years ago
A bakery sold 108 cupcakes in one day. The head baker predicted he would sell 88 cupcakes that day. What was the percent error o
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3 years ago
Read 2 more answers
*Please I need help quickly* Approximate the mean of the frequency distribution for the ages of the residents of a town.
Cerrena [4.2K]

Answer:

The mean age of the frequency distribution for the ages of the residents of a town is 43 years.

Step-by-step explanation:

We are given with the following frequency distribution below;

 

     Age                      Frequency (f)               X                    X \times f

     0 - 9                            30                         4.5                   135

    10 - 19                           32                        14.5                  464

    20 - 29                         12                         24.5                 294

    30 - 39                         20                        34.5                 690

    40 - 49                         25                        44.5                1112.5

    50 - 59                         53                        54.5                2888.5

    60 - 69                         49                        64.5                3160.5

    70 - 79                          13                         74.5                968.5

    80 - 89                  <u>        8        </u>                  84.5         <u>        676        </u>

    Total                      <u>      242      </u>                                  <u>      10389      </u>

Now, the mean of the frequency distribution is given by the following formula;

                          Mean =  \frac{\sum X \times f}{\sum f}

                                     =  \frac{10389}{242}  = 42.9 ≈ 43 approx.

Hence, the mean age of the frequency distribution for the ages of the residents of a town is 43 years.

5 0
3 years ago
Read 2 more answers
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