Please can someone help?

Mathematics

2 answers:

Lady_Fox [76]3 years ago

5 0

Answer:

The answer is 40cm

Step-by-step explanation:

hope this helps :)

Nikolay [14]3 years ago

3 0

Answer:

Step-by-step explanation:

Side of square = x

Long side of rectangle = x + 5

Short side of rectangle = x - 3

(x - 3)(x + 5) = 84

$x^2+2x-15=84$

x = 9, x = -11

X has to be 9 because x cannot be negative.

9 + 5 = 14

9 - 3 = 6

14 + 14 + 6 + 6 = 40

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noname [10]

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3 years ago

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Kali spent half of her weekly allowance on clothes. To earn more money her parents let her clean the gutters for $9. What is her

Ber [7]

So to find the answer to this, you have to consider that $\frac{1}{2} x + 9 = 13$ - half because half the pocket money (x) was spend on clothes, then plus 9 because that's how much extra she gained and 13 because that was the result of all the changes.

To solve this, first subtract 9 from both side, which leaves you with $\frac{1}{2} x = 4$ and $\frac{1}{2} x$ is the same as $\frac{1x}{2}$ , so to solve this, multiply both sides of the equation by two, resulting in $x = 8$ . SO from this we can conclude that the weekly allowance is $8