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ki77a [65]
3 years ago
10

Solve the system by substitution. x + 6y = -2 -x= 3y - 10

Mathematics
1 answer:
TiliK225 [7]3 years ago
5 0

Answer:

x = 22, y = -4

Step-by-step explanation:

x + 6y = -2 --- Equation 1

-x = 3y - 10 --- Equation 2

Equation 2 ×(-1): x = -3y + 10 --- Equation 3

Substitute x = -3y + 10 into Equation 1:

x + 6y = -2

-3y + 10 + 6y = -2

3y + 10 = -2

3y = -2-10

    = -12

y = -12 ÷ 3

y = -4

Substitute y = -4 into Equation 3:

x = -3y + 10

x = -3(-4) + 10

  = 12 + 10

x = 22

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The table shows the results of rolling a number cube, with sides labeled 1 through 6, several times.
Sunny_sXe [5.5K]

Answer:

\frac{2}{5}

Step-by-step explanation:

Given :

Outcome  Number of times outcome occurred

1                          10

2                          6

3                          4

4                          8

5                          6

6                          6

To find: What is the experimental probability of rolling a 1 or a 5?

Solution:

No. of times dice rolled =  10+6+4+8+6+6=40

No. of times 1 occured = 10

So, probability of getting 1 = \frac{10}{40}

No. of times 5 occured = 6

So, probability of getting 5 = \frac{6}{40}

So, probability of rolling a 1 or a 5 =  \frac{10}{40}+\frac{6}{40}

                                                        =  \frac{16}{40}

                                                        =  \frac{2}{5}

Hence the experimental probability of rollin 1 or a 5 is \frac{2}{5}.

5 0
3 years ago
Plz help! I will make u brainliest
Semenov [28]

A = 65     B = 40

because you can set it up as 13x-8x=25 this turns to 5x=25 and that turns to x=5 so you get 13*5=a     and      8*5=b       so a=65    and b=40

5 0
3 years ago
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