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3 years ago

What is the difference between 21.25-1.509

Mathematics

1 answer:

PSYCHO15rus [73]3 years ago

7 0

Answer:

19.741

Step-by-step explanation:

When subtracting decimals line up the decimals and then add 0s to the end to make it work. SO instead of

21.25

-1.509

___________

It would be

21.250

- 1.509

______________

Solve the subtraction problem like you normally would. THen drop the decimal down so it lies up with the others.

21.250

- 1.509

______________

19.741

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How many solutions are there to the equation below 15x+11=8x

Svetradugi [14.3K]

Answer:

There is one solution

Step-by-step explanation:

15x+11=8x

Subtract 15x from each side

15x-15x +11 = 8x-15x

11 = -7x

Divide by -7

11/-7 = -7x/-7

-11/7 =x

There is one solution

8 0

3 years ago

Read 2 more answers

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

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

In which

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

65% were found to be proficient in both reading and mathematics.

This means that $A \cap B = 0.65$

78% were found to be proficient in mathematics

This means that $B = 0.78$

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

$0.78 = b + 0.65$

$b = 0.13$

85% of the students were found to be proficient in reading

This means that $A = 0.85$

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

$0.85 = a + 0.65$

$a = 0.20$

Proficient in at least one:

$(A \cup B) = a + b + (A \cap B) = 0.20 + 0.13 + 0.65 = 0.98$

What is the probability that the student is proficient in neither reading nor mathematics?

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

$C = 1 - (A \cup B) = 1 - 0.98 = 0.02$

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

6 0

2 years ago

Help me with writing a check please

Dennis_Churaev [7]

Answer: pay to the order of: Price Chopper.... $145.19.... next line: One hundred forty-five and 19/100.... bottom left line: whatever the money is for.... next line: signature. 5. fifty-four and 68/100 dollars 6. One hundred seventeen and 92/100 dollars 7. twenty dollars

Step-by-step explanation:

3 0

2 years ago

Find the ratio in which the line joining the points (2, 4, 16) and (3, 5, -4) is divided by the plane 2x – 3y+ z+ 6 = 0. Also fi

Nastasia [14]

Answer:

Step-by-step explanation:

let the plane intersects the join of points in the ratio k:1

let (x,y,z) be the point of intersection.

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point of intersection is (8/3,14/3,8/3)

and ratio of division is 2:1

5 0

3 years ago

10 points to whoever answers this CORRECTLY and QUICKLY. Thanks

Ainat [17]

1 solution

x = -1/2

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

4 0

3 years ago