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AnnyKZ [126]
3 years ago
13

Please help! (: I know the middle one is 3

Mathematics
2 answers:
Olenka [21]3 years ago
5 0

<u><em>When x = -2</em></u>, f(x) = -7(-2) + 3 = 14 + 3

<u><em>x = 17</em></u>

<u><em>When x = 5</em></u>, f(x) = -7(5) + 3 = -35 + 3

<u><em>x = -32</em></u>

All you have to do to solve the function is substitute the value of x into the equation.

Lerok [7]3 years ago
5 0

Answer:

when x=-2, f(x)=17


when x=0, f(x)=3


when x=5, f(x)=-32


Step-by-step explanation:

f(x)=-7x+3 when x=-2, 0 and 5

when x=-2,

f(x)=f(-2)

=-7*(-2)+3

=14+3

=17


when x=0,

f(x)=f(0)

=-7*(0)+3

=0+3

=3


when x=5,

f(x)=f(5)

=-7*(5)+3

=-35+3

=-32

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levacccp [35]
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7 0
3 years ago
12. The weight of 56<br>books is 8kg. What<br>is the weight of 154<br>such books?​
Korvikt [17]

Answer:

56+56=112 16kg

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Step-by-step explanation:

5 0
3 years ago
The weights (in pounds) of 18 preschool children are
ivanzaharov [21]

Answer:

22.8 and 37.5

Step-by-step explanation:

Given the

The weights (in pounds) of 18 preschool children are

32, 20, 25, 27, 31, 22, 30, 23, 44, 37, 33, 45, 41, 24, 34, 21, 39, 29

To find its 20th percentile and 75th percentile.

In ascending order we get like this

Position  X (Asc. Order)

1  20

2  21

3  22

4  23

5  24

6  25

7  27

8  29

9  30

10  31

11  32

12  33

13  34

14  37

15  39

16  41

17  44

18  45

Percentile position = (no of entries +1)20/100 = 19/5 = 3.8

Since posiiton is not integer we use interpolation method.

The value of 3.8 - 3 = 0.8 corresponds to the proportion of the distance between 22 and 23 where the percentile we are looking for is located at.

Hence 20th percentile = 22+0.8(23-22)=22.8

So answer is 22.8

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

75th percentile

Percentile posiiton = 19(75)/100 = 14.25

75th percentile= 37+0.25(39-37)=37.5

6 0
3 years ago
The mark up on an item is $3.75. If the mark up is 35%, what was the original price? Round
oksian1 [2.3K]

Answer:

$10.71

Step-by-step explanation:

\frac{3.75}{y} =\frac{35}{100}

y × 35 = 3.75 × 100

35y = 375

35y ÷ 35 = 375 ÷ 35

y=10\frac{5}{7}

y = 10.7142857143

10.7142857143 round to 10.71

5 0
3 years ago
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