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romanna [79]
3 years ago
7

Samuel used the distributive property to simplify the expression -6(-2 - 10x) - 7x and came up with 53x - 12 which is incorrect.

What is Samuel’s mistake? What is the correct answer?
Mathematics
1 answer:
Komok [63]3 years ago
7 0

Answer:

He messed up the signs, most likely by multiplying incorrectly. It should be 53x+12.

Step-by-step explanation:

You begin by multiplying both -2 and -10x by -6.

Remember a negative times a negative makes a positive.

-6(-2-10x)

12+60x

Then you need to combine like terms which are 60x and -7x

60x-7x

53x

So that means the final answer will be

53x+12

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DUE NOW
Llana [10]

Answer:

Relative frequencies

First row

0.8125 ,0.1875 ,16

Second row

0.555 ,0.444 ,9

third row

18 , 7 ,  25

Step-by-step explanation:

Given data

               allowance        No allowance          total

Chores         13                   3                          16

<u>No chores      5                   4                           9</u>

<u>Total              18                   7                            25</u>

<u><em>Relative frequencies</em></u>

               allowance          No allowance                  total

Chores         \frac{13}{16} = 0.8125     \frac{3}{16} = 0.1875                       16

No chores      \frac{5}{9} = 0.555      \frac{4}{9} = 0.444                            9

Total  <u>            18                   7                                   25</u>

3 0
3 years ago
Which one of the following statement is true of parallel lines?
mezya [45]
Parallel lines run along side of each other, but never intersect.

-----------------------
                              <== these are parallel lines...they never cross
-----------------------
3 0
3 years ago
Read 2 more answers
What is f(x)=2x^2+5 multiply by g(x)=2x
Kryger [21]

Answer:

4x^3 +10x

Step-by-step explanation:

for f(x) × g(x) you should multiply their functions :

(2x^2+5)×(2x) = 4x^3 +10x

6 0
3 years ago
A tire company finds that the lifespan for one brand of its tires is normally distributed with a mean of 47,500 miles and a stan
Illusion [34]

Answer:

42580 miles

Step-by-step explanation:

Mean = \mu = 47500

\sigma = 3000

The manufacturer does not want to replace more than 5% of the tires

P(X\leq x)=5\%

P(\frac{x-\mu}{\sigma}\leq \frac{x-47500}{3000})=0.05

By using normal table values :

\frac{x-47500}{3000}=-1.64

x=(-1.64 \times 3000)+47500

x=42580

Hence the approximate number of miles for the warranty is 42580 miles

6 0
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coldgirl [10]
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