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3 years ago

Has anyone done IXL N.2 7th grade, can you help me!!!

Mathematics

1 answer:

ziro4ka [17]3 years ago

6 0

Okay... let’s see if I remember this! So... first off, convert the whole number into a fraction. To do this, we would need to multiply the number (20) by 2, since the denominator is 2, and then add it to the 1/2 we already have.

= 41/2 × 3/4

Then, put the fractions formula for multiplication into play... (numerators on top, denominators on bottom)

41 × 3
= ————
2 × 4

This would equal 123/8.

Now, we aren’t done yet. To get our final answer, we would to simplify 123/8 to the point where it can’t be any more simple. (For example, if we had 2/2, we would have to simplify that because 2/2 = 1. We wouldn’t be able to simplify the 1 any more than that, making 1 the final answer.) I’ll just do the math for you here. 123/8 simplified completely is 15 3/8.

( 123/8 = 15 3/8.)

I kind of went into detail just in case you were having trouble with these kinds of problems, which I hope isn’t too much of a problem!! Have a good day and I hope this helps :)

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Frank's bookshelf is 1 1/2 meters high. each row in the bookshelf is 3/16 meters high. how many rows are there in Frank's booksh

Dovator [93]

I hope this helps you

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4 years ago

Read 2 more answers

Select all that apply. the theorems in the lesson are followed by which of the following?

musickatia [10]

Answer: E

Step-by-step explanation: In mathematics, a theorem is a statement that has been proven on the basis of previously established statements, such as other theorems, and generally accepted statements, such as axioms. A theorem is a logical consequence of the axioms. ... Many mathematical theorems are conditional statements.

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3 years ago

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Seventy percent of kids who visit a doctor have a fever and 21% of kids have fever and sore throats . what is the probability th

Neko [114]

The probability that a kid who goes to the doctor has a sore throat given that he has a fever is <u>0.30 or 30%</u>. Computed using conditional probability.

The probability of any event A given that event B has already taken place is found using the formula P(A|B) = P(A ∩ B)/P(B). This is known as conditional probability, where P(A ∩ B) is the probability of events A and B, and P(B) is the probability of event B.

In the question, we are given that 70% of kids who visit a doctor have a fever and 21% of kids have a fever and sore throats.

We are asked to find the probability that a kid who goes to the doctor has a sore throat given that he has a fever.

We suppose the event of going to the doctor while having a fever to be B, and going to a doctor while having a sore throat to be A.

We are given that 70% of kids who visit a doctor have a fever, that is, the probability of event B, P(B) = 70% = 0.7.

We are given that 21% of kids who visit a doctor have a fever and sore throats, that is, the probability of event A and event B, P(A ∩ B) = 21% = 0.21.

We are asked to find the probability that a kid who goes to the doctor has a sore throat given that he has a fever, that is, we are asked to find the conditional probability of event A, when event B has already taken place, that is, P(A|B).

By formula, we know that:

P(A|B) = P(A ∩ B)/P(B) = 0.21/0.70 = 0.30.

Thus, the probability that a kid who goes to the doctor has a sore throat given that he has a fever is <u>0.30 or 30%</u>.

Learn more about conditional probability at

brainly.com/question/10739997

#SPJ4

3 0

2 years ago

How do you solve 10x -1 +2y =15

julsineya [31]

Your answer is $x = (8-y) / 5$

Here's how:

Step 1: Add 1 to both sides. 10x + 2y = 15 + 1

Step 2: Simplify 15 + 1 to 16. 10x + 2y = 16

Step 3: Factor are the common term 2. 2(5x + y) = 16

Step 4: Divide both sides by 2. 5x + y = 16/2

Step 5: Simplify 16/2 to 8. 5x + y = 8

Step 6: Subtract y from both sides. 5x = 8 - y

Step 7: Divide both sides by y. x = (8-y) / 5

This answer is if you want to solve for x! If you want to solve for y, let me know and I'll change my answer! Have a nice night!

3 0

3 years ago

Running at an average rate of 4 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the st

yaroslaw [1]

<h2>Length of track is 168 meter</h2>

Step-by-step explanation:

Let l be the length of track.

Running speed = 4 m/s

Jogging speed = 2 m/s

Total time taken = 2 minutes 6 seconds. = 126 seconds

That is

$\frac{l}{4}+\frac{l}{2}=126\\\\0.75l=126\\\\l=168m$

Length of track is 168 meter

5 0

3 years ago