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3 years ago

I need help:/ with those two

Mathematics

1 answer:

White raven [17]3 years ago

3 0

12 is B. You because the graphs slope is 1. 13 is A 7 I think.

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Divide. Round your answer to the nearest tenth.

nika2105 [10]

The answer to your question is. 103.2

3 0

2 years ago

-Solve each equation. Example x+3=12 9+3=12

mash [69]

$y + 9 = 9 | - 9 \\ y+ 9 - 9 = 9 - 9 \\ y = 0$

$10 + 2x = 20 | - 10 \\ 10 + 2x - 10 = 20 - 10 \\ 2x = 10 | \div 2 \\ 2x \div 2 = 10 \div 2 \\ x = 5$

$17 + 3c = 26 | - 17 \\ 17 + 3c - 17 = 26 - 17 \\ 3c = 9 | \div 3 \\ 3c \div 3 = 9 \div 3 \\ c = 3$

$x - 4 = 3 | + 4 \\ x - 4 + 4 = 3 + 4 \\ x = 7$

$2z - 7 = 7 | + 7 \\ 2z - 7 + 7 = 7 + 7 \\ 2z = 14 | \div 2 \\ 2z \div 2 = 14 \div 2 \\ z = 7$

7 0

2 years ago

A probability experiment will consist of selecting one of two stacks of cards, and then choosing a card at random from the stack

postnew [5]

Answer:

The probability that the red card came from the first stack is:

40%

Step-by-step explanation:

a) Data and Calculations:

Stack Red Blue Total

First 6 5 11

Second 9 0 9

Total 15 5 20

The probability of selecting from the first stack = 50% since equal opportunity is given to the two sacks.

The probability of red card from the first stack = 6/15 = 0.4 = 40%.

b) The probability that the red card came from the first stack is given by the number of red cards in the first stack divided by the number or red cards in the two stacks. This is equal to 6/15 = 0.4 or 40%.

4 0

2 years ago

Solve for y: y+6=5(x-4)

lbvjy [14]

Answer:

Step-by-step explanation:

y+ 6= 5(x-4)

y + 6= 5x-20

-6 . -6

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

y= 5x-26

6 0

3 years ago

A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given th

taurus [48]

Answer:

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 27 - 1 = 26

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.0518