3 years ago

A rectangle has an area of 54 square centimeters. The width is 3 more

Mathematics

1 answer:

Troyanec [42]3 years ago

7 0

Answer:

W = 6

L = 9

Step-by-step explanation:

area = 54 = L x W

L = W + 3

substitute for L:

54 = W(W + 3)

W² + 3W = 54

W² + 3W - 54 = 0

(W + 9)(W - 6) = 0

W = 6

L = 6 + 3 = 9

You might be interested in

What are the zeros of the following quadratic equation: y = 6x2 - 17x - 3

Mama L [17]

Answer:

$\displaystyle x=-\frac{1}{6}, 3$

Step-by-step explanation:

Hi there!

$y = 6x^2 - 17x - 3$

Factor by grouping:

$y = 6x^2 - 18x+1x - 3\\y = 6x(x- 3)+1x - 3\\y = 6x(x- 3)+(x - 3)\\y = (6x+1)(x- 3)$

Let y=0. Apply the zero product property:

$0 = (6x+1)(x- 3)$

$6x+1=0\\6x=-1\\\\\displaystyle x=-\frac{1}{6}$

AND

$x-3=0\\x=3$

I hope this helps!

5 0

3 years ago

Rearrange x = 7y - 5 to make y the subject.

nalin [4]

By rearranging x = 7y - 5 to make y the subject, we get

x + 5 = 7y ( By transposition method )

or, $\huge \purple {\tt {\frac{x + 5}{7} = y}}$

<h2>Answer:</h2>

$\huge \pink {\tt {y = \frac{x + 5}{7}}}$

3 0

3 years ago

Solve : h /24 = - 6

docker41 [41]

Answer:

h = -144

you multiply 24 and -6 to get -144.

5 0

3 years ago

Read 2 more answers

Does the graph represent a function?

Musya8 [376]

Answer:

yes

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

x squared plus y squared equals 80. My daughter has to work out what x and y are. I have worked it out by trial and error, but k

olya-2409 [2.1K]

you Need to think of 2 square numbers that add up to make 80

answer:

64 + 16

this means that x = 8 and y = 4

because of the square roots

y = 4

and

x = 8

7 0

4 years ago