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2 years ago

4x – y = 7 3y – 12x = –21

Mathematics

2 answers:

Elis [28]2 years ago

6 0

Answer:

y= 4x − 7 or 0=0

Step-by-step explanation:

4x−y+−4x=7+−4x

meriva2 years ago

3 0

The answer is y=4x-7

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15. Identify the slope of the line below and state the equation of the line.

mamaluj [8]

Answer:

Slope: m = 0

Equation: y = 3

Step-by-step explanation:

The equation of a line has the following format:

$y = mx + b$

In which m is the slope.

We choose two points which the equation crosses.

I am going to choose (0,3) and (1,3)

(0,3)

When x = 0, y = 3. So

$y = mx + b$

$3 = 0m + b$

$b = 3$

(1,3)

When x = 1, y = 3. So

$y = mx + 3$

$3 = 1m + 3$

$m = 0$

Slope: m = 0

Equation: y = 3

6 0

3 years ago

Hi can u help please thanks

faltersainse [42]

The first one is the answer/

8 0

3 years ago

All the fourth-graders in a certain elementary school took a standardized test. A total of 85% of the students were found to be

Aneli [31]

Answer:

There is a 2% probability that the student is proficient in neither reading nor mathematics.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that a student is proficient in reading

B is the probability that a student is proficient in mathematics.

C is the probability that a student is proficient in neither reading nor mathematics.

We have that:

$A = a + (A \cap B)$

In which a is the probability that a student is proficient in reading but not mathematics and $A \cap B$ is the probability that a student is proficient in both reading and mathematics.

By the same logic, we have that:

$B = b + (A \cap B)$

Either a student in proficient in at least one of reading or mathematics, or a student is proficient in neither of those. The sum of the probabilities of these events is decimal 1. So

$(A \cup B) + C = 1$