Answer:
4cm
Step-by-step explanation:
first find the length of the side of one square
the length of the rectangle will be twice the width
let y represent the width
area of a rectangle=length x width
2cm²=2yxy
2cm²=2y²
2cm²/2=2y²/2
1cm²=y²
1√cm²=√y²
1cm=y
perimeter of a square=4xside
4x1cm
4cm
Answer:
Step-by-step explanation:
I believe the answer is e
<h2>Matrix</h2>
<em><u>matrix</u></em> is a rule of writing or presenting data consisting of rows and columns in an open or closed parenthesis.
<em><u>•</u></em><em><u> </u></em><u><em>the problem above is about matrix </em><em>multiplication</em></u>
the first type of multiplication :
if k is a constant and A is a matrix, then kA can be operated by multiplying each element of matrix A by the constant k.
<em>ex </em><em>:</em><em> </em>3[-1 2 2] = [-3 6 6]
multiplication of two matrices :
the multiplication of a 1x n matrix and a n × 1 column matrix is a 1 × 1 matrix.
<em><u>the above problem using matrices of 3 × 1 and 1 × 3 size will produce a 3 × 3 </u></em><em><u>matrix</u></em><em><u>. </u></em>
<h3>Answer :</h3>
| 3 | | 9 |
3|19| [-1 -3 -5] =|57| [-1 -3 -5]
|12| |36|
| 9×(-1) 9×(-3) 9×(-5) |
= | 57×(-1) 57×(-3) 57×(-5)|
| 36×(-1) 36×(-3) 36×(-5)|
| -9 -27 -45 |
= | -57 -171 -285|
| -36 -108 -180|
4 years=48 months
A new car costs 25,000, but she will get 13,000 for her used car as long as she takes good car of it. If she takes good care of her used car and gets 13,000 for it, she will only need to save 12,000 total. We can divide 12,000 by 48 to find out how much Courtney should save minimum each month to afford her new car. 12,000/48=250
You can check to see if this is correct by multiplying 48*250=12,000. Paying 250 for each month of the 48 months will equal the $12,000 that Courtney needs.
Courtney needs to save at least $250 per month to afford her new car in 4 years.
I hope this helps :)