2 years ago

A rectangle has a width that is 7 centimeters less than its length, and its area is 330 square centimeters. What are

Mathematics

2 answers:

Shalnov [3]2 years ago

8 0

Answer:

w = 15 cm

l = 22 cm

Step-by-step explanation:

A = w·l

w = l - 7

A = (l - 7)·l

330 = l² - 7l

l² - 7l - 330 = 0

l² + 15l - 2l - 330 = 0

l(l + 15) - 22(l + 15) = 0

(l - 22)(l + 15) = 0

l - 22 = 0 => l = 22 cm

l + 15 = 0 => l = - 15 < 0 (f)

w = l - 7 = 22 - 7 => w = 15 cm

natali 33 [55]2 years ago

7 0

Answer:

22,15

Step-by-step explanation:

width = l-7

l*(l-7) =330

You might be interested in

What is the height of a triangle that has an area of 60 yards^2 and a base of a length of 12 yards?

zmey [24]

For a triangle:
$A=\frac{b \times h}{2}$
$60=\frac{12\times h}{2}$
$120=12h$
$h=\frac{120}{12}$
$h=10yrd$

3 0

2 years ago

What is the area of the figure? I give brainliest and thanks! :)

Alex17521 [72]

Answer:

ok I would give answer that is 85.5mi^2

7 0

2 years ago

What is the measure of the angle shown? Will mark brainliest!

FrozenT [24]

Answer:

142

Step-by-step explanation:

3 0

2 years ago

Enlarge the triangle by scale factor 1.5 using (4, 4)<br> as the centre of enlargement.

Goryan [66]

The answer is 6,5 on the graph

3 0

2 years ago

Because all of the ending values are given in feet, find the window dimensions in feet. Convert the length of 3 feet, 9 inches s

MA_775_DIABLO [31]

Answer: 3.75 ft

Step-by-step explanation:

Here we are given the measure of the length of a window. Generally the length is given in the International System of units format (meters); however, in this case we are given the length in feet and inches:

$3 ft+9 in$

Now, before converting this whole measure to feet, we have to know that $1 ft=12 in$ , then we can perform the conversion:

$9 in \frac{1 ft}{12 in}=0.75 ft$

This means $9 in=0.75 ft$

Hence:

$3 ft+9 i=3 ft+0.75 ft=3.75 ft$ This is the measure of the length of the window in feet.

8 0

2 years ago