MATHEMATICS MIDDLE SCHOOL

When x is 3, y is 15. If y varies directly as x, which equation relates x and y?

Answers

Answer 1

Answer:

Answer:

x5=y

Step-by-step explanation:

Let's say 3y=15

3 x 5 = 15, so y=5.

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Write each decimal in words 0.214

Answers

Two hundred fourteen thousandths ( Don't add the "and" between hundred and fourteen because they will think the number 0.214 is actually written like 200.14)

Action movies make up 85% of Devon's movie collection. If he has 20 movies,how many action movies are in Devon's collection?

Answers

Method 1

We can find the number of Devon's movie collection by multiplying its percentage by the number of Action movies. That is;

Number of Devon's movie collection $= (85)/(100) * 20=(85)/(5) =17$

Method 2

We can also use ratio and proportion. According to the question, out of every 100 Action movies 85 are Devon's Movie collection. This means,

Action movies Devon's collection

100 85

20 $x$

If 100 corresponds to 85, then 20 will correspond to a less value than 85. If less more divides,Hence,

$x=(85 * 20)/(100)=17$ .

Therefore he has 17 movies that are in Devon's collection.

The answer is 17, because you know it’s going to be most of it, so you do 20 times .85 on your calculator, and you have your answer! :)

Solve this equation
2^(x+3) = 512

Answers

2^(x + 3) = 512
ln(2^(x + 3)) = ln(512)
(x + 3)ln(2) = ln(512)
ln(2) ln(2)
(x + 3)ln(2) = ln(2^9)
ln(2) ln(2)
(x + 3)ln(2) = 9ln(2)
ln(2) ln(2)
x + 3 = 9
- 3 - 3
x = 6

x=1,the equation=16 ; x=2,the equation=32; by such analogy,when x=6,the equation=512. so the answer is x=6.

The line plot shows how many siblings each student has. how many more students have only one sibling than at least 3 siblingsx
x x
x x
x x x x
x x x x x
x x x x x
<----l-------l--------l-------l-------l--->

Answers

So for this you must ignore the student with 2.

then you see how many in order

1-6 siblings
1-5 siblings
2-3 siblings

add up the left coulumn to get 4 people have more than 3 siblings

Please help me on my second problem

Answers

the answer is 0 there are no blue chips in the bucket.

Write a definition of rounding in your own words???

Answers

Rounding is when you have at least a two digit number (26 for example) and if the number the right (6) is 5 or above then the number goes up one unit, (therefore 26 becomes 27). But if the number (22) to the right is 4 or lower, then the number to the right stays the same, but the number to the right becomes a zero, (making 22 now 20).

Rounding is when you make your number go higher or lower based on the given information.

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