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Ugo [173]
3 years ago
8

Just do one or hole thing but write question number​

Mathematics
1 answer:
ahrayia [7]3 years ago
5 0
Question 9

a. The answer is 13
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Please explain fully and i give brainiest thanks and 5 stars
otez555 [7]

Answer:

a=7,\\b=3

Step-by-step explanation:

The area of a rectangle is equal to A=l\cdot w, where l is the length of the rectangle and w is the width of the rectangle. In a rectangle, opposite sides are equal.

Therefore, we can write the following system of equations:

\begin{cases}a\cdot (9+b)=84,\\a\cdot b=21\end{cases}

Expand the first equation:

9a+ab=84

Substitute the second equation into the first (ab=21):

9a+21=84,\\9a=63,\\a=\boxed{7}

Solving for b:

7b=21,\\b=\frac{21}{7}=\boxed{3}

8 0
3 years ago
Read 2 more answers
The circumference of Z is 84 cm. What is the length of xy (the minor arc)?
Orlov [11]

Answer:21 cm

Step-by-step explanation: The circle's circumference is 84 cm. 84 / 4 = 21. Therefore the length of the arc XY is 21 cm.

6 0
3 years ago
Please help me with this ​
Cerrena [4.2K]

Answer:

30cm³

Step-by-step explanation:

volume of cuboid =L x B x H

=5 x 3 x 2

=30cm³

<h2><em>OladipoSeun</em><em>♡˖꒰ᵕ༚ᵕ⑅꒱</em></h2>
6 0
3 years ago
The equation d=m/v can be used to calculate the density
frutty [35]

yes the equation can be used to measure density

8 0
3 years ago
PLEASE I NEED A REAL ANWSER NO LIES
iren [92.7K]

Answer:

(3a - 4 )^2

Step-by-step explanation:

(9a^2-24a+16)=(3a - 4 )^2

Therefore the length of each side of the square is (3a - 4 )^2

4 0
3 years ago
Read 2 more answers
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