All categories

4 years ago

Explain why the net shown here could not be the net of a cube

Mathematics

1 answer:

Ivanshal [37]4 years ago

4 0

Answer:

A net is a two-dimensional figure that can be folded into a three-dimensional object

Step-by-step explanation:

You might be interested in

What is the equation of the line that passes through (-2,3) and is parallel to 2x+3y=6?

Vsevolod [243]

Answer:

Step-by-step explanation:

$\bold{METHOD\ 1:}$

The slope-intercept form of an equation of a line:

$y=mx+b$

m - slope

b - y-intercept

Let $k:y=m_1x+b_1,\ l:y=m_2x+b_2$

then

$l\ \parallel\ k\iff m_1=m_2\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}$

We have the equation of a line:

$2x+3y=6$

Convert to the slope-intercept form:

$2x+3y=6$ subtract 2x from both sides

$3y=-2x+6$ divide both sides by 3

$y=-\dfrac{2}{3}x+2\to m_1=-\dfrac{2}{3}$

therefore the slope is $m_2=-\dfrac{2}{3}$

Put the value of the slope and the coordinates of the point (-2, 3) to the equation of a line:

$3=-\dfrac{2}{3}(-2)+b$

$3=\dfrac{4}{3}+b$ subtract 4/3 from both sides

$\dfrac{9}{3}-\dfrac{4}{3}=b\to b=\dfrac{5}{3}$

Finally:

$y=-\dfrac{2}{3}x+\dfrac{5}{3}$

Convert to the standard form (Ax + By = C):

$y=-\dfrac{2}{3}x+\dfrac{5}{3}$ multiply both sides by 3

$3y=-2x+5$ add 2x to both sides

$2x+3y=5$

$\bold{METHOD\ 2:}$

Let $k:A_1x+B_1y=C_1,\ l:A_2x+B_2y=C_2$ .

Lines k and l are parallel iff

$A_1=A_2\ \wedge\ B_1=B_2\to\dfrac{A_2}{A_1}=\dfrac{B_2}{B_1}$

We have the equation:

$2x+3y=6\to A_1=2,\ B_1=3$

then the equation of a line parallel to given lines has the equation:

$2x+3y=C$

Put the coordinates of the point (-2, 3) to the equation:

$C=2(-2)+3(3)\\\\C=-4+9\\\\C=5$

Finally:

$2x+3y=5$

4 0

3 years ago

Multiply x2-3x-2 by 1/7x.

Readme [11.4K]

So, the problem is 2x - 3x - 2 • 1/7x ?

2x - 3x - 2 • 1/7x

So, combine like terms.

-1x - 2 • 1/7x

-1/7x • 2

The answer would be about -0.3x ?

If I’m understanding correctly.

7 0

2 years ago

If x= 9 and y= 1589 Then find x+yf

Delvig [45]

The answer is :

9+1589(f)

4 0

3 years ago

Read 2 more answers

eryn buys 3 bracelets and 4 scarves.each bracelet costs $6.eryn pays the clerk $40 and gets $2 change.what is the cost,in dollar

rusak2 [61]

Answer: 5 dollars

Step-by-step explanation: if 3 bracelets are 6 dollars then 18 for 3 bracelets

so 40 - 18 = 22 minus 2 dollars back = 20

20 divided by 4 scarves = 5

hope this helps mark me brainliest if it did

4 0

4 years ago

Read 2 more answers

charissa ordered 3 cans of lemonade for each person at her party. She also ordered 1 pizza for every 4 people. If she ordered 6

krek1111 [17]

Answer:

72 cans

Step-by-step explanation:

step 1

Find the number of people

we know that

She ordered 1 pizza for every 4 people

using proportion

Find out the number of people for 6 pizzas

$\frac{1}{4}=\frac{6}{x}\\\\x=24\ people$

step 2

Find the number of cans ordered

we know that

Charissa ordered 3 cans of lemonade for each person

using proportion

Find out the number of cans of lemonade she ordered for 24 people

$\frac{3}{1}=\frac{x}{24}\\\\x=24(3)\\\\x=72\ cans$

7 0

3 years ago

Explain why the net shown here could not be the net of a cube​

Explain why the net shown here could not be the net of a cube