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3 years ago

The length and width of a rectangle are doubled. Write a formula for the new area. How is the area changed?

Mathematics

1 answer:

Vaselesa [24]3 years ago

5 0

Answer:

2l + 2w = A

Step-by-step explanation:

l = length

w = width

A = Area

The area is doubled.

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( 4.2 + 3 ) + (5.7 x - 2 ) + ( 5 — 2.6 x)

White raven [17]

Answer is 10.2 + 3.1x
Solve by combining like terms

5 0

3 years ago

PLEASE HELP ASAP! What are the solutions to the system of equations?

musickatia [10]

Y=2x

so what you do is sub 2x for y in the top equation

x^2+(2x)^2=5
x^2+4x^2=5
5x^2=5
divide both sides by 5
x^2=1
sqrt both sides
x=1 or -1

sub back

y=2x

y=2(-1)
y=-2

y=2(1)
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8 0

3 years ago

A triangle has sides of length 2, 2, and 3. Which of the following is the measure of the obtuse angle of the triangle?

kramer

Answer:

$97.18^{\circ}$

Step-by-step explanation:

An obtuse angle in the triangle is opposite to the greatest side. The greatest side in the triangle with sides lengths 2, 2 and 3 is side with length 3. By the cosine rule,

$3^2=2^2+2^2-2\cdot 2\cdot 2\cdot \cos \alpha,\\ \\9=4+4-8\cos \alpha,\\ \\-8\cos \alpha=9-4-4=1,\\ \\\cos \alpha=-\dfrac{1}{8},\\ \\\alpha\approx 97.18^{\circ}.$

7 0

3 years ago

8.4 + 0.18x = 0.32x

bogdanovich [222]

Answer:

x = 60

Step-by-step explanation:

Perhaps you want the solution to this equation.

Subtract 0.18x from both sides:

8.4 = 0.14x

Divide by the coefficient of x.

8.4/0.14 = x = 60

3 0

3 years ago

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What is the solution to the equation?<br><br> 6x-3=3x+12

Alla [95]

Answer:

x=5

Step-by-step explanation:

Step 1: Subtract 3x from both sides.

6x−3−3x=3x+12−3x

3x−3=12

Step 2: Add 3 to both sides.

3x−3+3=12+3

3x=15

Step 3: Divide both sides by 3.

3x/3=15

x=5

8 0

3 years ago

Read 2 more answers

The length and width of a rectangle are doubled. Write a formula for the new area. How is the area changed?​

The length and width of a rectangle are doubled. Write a formula for the new area. How is the area changed?