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2 years ago

PLEASE HELP!!! i’ll mark brainliest if you’re correct!

Mathematics

1 answer:

ira [324]2 years ago

8 0

Answer:

1.5

Step-by-step explanation:

15/10=1.5

21/14=1.5

Check:

10x1.5=15

Hope this helps!

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Presley is organizing the school book sale. Each stall will have 40 books on the shelf and 2 boxes of books with b books inside.

Anit [1.1K]

40s+2bs+200=number of books needed

if we want 12 books and 8 stalls

b=12
s=8
solve

40(8)+2(12)(8)+200=
320+192+200=
712

needs 712 books

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3 years ago

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What is the length of n ? 16 8 2 4

Dima020 [189]

Answer:

Step-by-step explanation:

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3 years ago

Complete the table to differentiate between the three states of matter.

Lorico [155]

Answer: I hope it helped.

Step-by-step explanation:

Arrangement of Particles:

Solid: solid are tightly packed, usually in a regular pattern.

Liquid: are close together.

Gas: gas are well separated.

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3 years ago

Which relationships have the same constant of proportionality between y and x as in the equation y=1/2x Choose 3 answers:

Andrew [12]

Answer:

A and B has the same constant of proportionality

Step-by-step explanation:

$y \propto x$

$y = kx ----1$

Where k is the constant of proportionality

We are supposed to find Which relationships have the same constant of proportionality between y and x as in the equation $y=\frac{1}{2}x$

On comparing with 1

$k = \frac{1}{2}$

A)6y = 3x

$y = \frac{3}{6}x\\y = \frac{1}{2}x$

So, this equation has the same constant of proportionality

B) $(x_1,y_1)=(2,1)\\(x_2,y_2)=(4,2)$

To find the equation :

Formula : $y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

So, $y - 1=\frac{2-1}{4-2}(x-2)\\y-1=\frac{1}{2}(x-2)\\y-1=\frac{1}{2}x-1\\y=\frac{1}{2}x$

So, this equation has the same constant of proportionality

$(x_1,y_1)=(1,2)\\(x_2,y_2)=(2,4)$

To find the equation :

Formula : $y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

So, $y - 2=\frac{4-2}{2-1}(x-1)\\y - 2=2(x-1)\\y - 2=2x-2\\y=2x$

So, this equation do not has the same constant of proportionality

$(x_1,y_1)=(2,1)\\(x_2,y_2)=(3,2.5)$

To find the equation :

Formula : $y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

So, $y - 1=\frac{2.5-1}{3-2}(x-2)$

$y-1=1.5(x-2)\\y-1=1.5x-3\\y=1.5x-2$

So, this equation do not has the same constant of proportionality

Hence A and B has the same constant of proportionality

3 0

3 years ago

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Match the following items by evaluating the expression for x=-3.

nika2105 [10]

-3^-3=1/(-3^3)=-1/27 maybe a typo, because you don't have this as an option
could have been -3^-2=1/(-3^2)=1/9

-3^-1=1/(-3^1)=-1/3

-3^0=1

-3^1=-3

-3^2=9

4 0

3 years ago

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