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3 years ago

PLEASE HELP! I REALLY NEED THIS ANSWERED!!!

Mathematics

1 answer:

expeople1 [14]3 years ago

4 0

Answer:

= 30mn^4

Step-by-step explanation:

The area of a trapezoid

A = 1/2 (a+b) *h

where a and b are the top and bottom

A = 1/2( 3mn^2+ 9mn^2) * 5n^2

Combine like terms

A = 1/2(12mn^2) * 5n^2

=6mn^2 * 5n^2

= 30mn^4

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BD is the angle bisector of

AlexFokin [52]

Note: Let us consider, we need to find the $m\angle ABC$ and $m\angle DBC$ .

Given:

In the given figure, BD is the angle bisector of ABC.

To find:

The $m\angle ABC$ and $m\angle DBC$ .

Solution:

BD is the angle bisector of ABC. So,

$m\angle ABD=m\angle DBC$

$3x=x+20$

$3x-x=20$

$2x=20$

Divide both sides by 2.

$x=\dfrac{20}{2}$

$x=10$

Now,

$m\angle DBC=(x+20)^\circ$

$m\angle DBC=(10+20)^\circ$

$m\angle DBC=30^\circ$

And,

$m\angle ABC=(3x)^\circ+(x+20)^\circ$

$m\angle ABC=(4x+20)^\circ$

$m\angle ABC=(4(10)+20)^\circ$

$m\angle ABC=(40+20)^\circ$

$m\angle ABC=60^\circ$

Therefore, $m\angle DBC=30^\circ,m\angle ABD=30^\circ$ and $m\angle ABC=60^\circ$ .

8 0

2 years ago

Greg earned $900 for washing 30windowa last month if Greg’s wage is increased by $2 per window this month how much will he earn

PtichkaEL [24]

Answer:

He earned for washing 30 windows this month = $960.

Step-by-step explanation:

Greg earned $900 for washing 30 windows.

Earning per window = 900/30 = $30

He increased the wage by $2 per window.

Earning per window this month = $32

He earned for washing 30 windows this month = 30 *32 =$960.

Thank you.

3 0

3 years ago

A shop owner can buy two televisions and three DVD players for $1750 or four televisions and one DVD players for $1250. Find the

Alenkasestr [34]

Answer:

Television = $200 and DVD player = $450

Step-by-step explanation:

→ Make 2 equations

Televisions = t and DVD players = d

2t + 3d = 1750

4t + d = 1250

→ Multiply the bottom equation by 3 to make the same variable of d

2t + 3d = 1750

12t + 3d = 3750

→ Minus the two equations to isolate the d variable

-10t = -2000

→ Divide both sides by -10 to find the cost of one television

t = 200

→ Substitute t = 200 back into 4t + d = 1250

800 + d = 1250

→ Minus 800 from both sides to isolate d

d = 450

7 0

2 years ago

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Tomtit [17]

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4 0

2 years ago

Need help and fast this work is due soon

Ugo [173]

Answer:

2x+3=4x-7

4x-2x=-7-3

2x=-10

X=-5

4 0

3 years ago