Answer:
800
Step-by-step explanation:
0℅ decrease of 800=800
Answer:
2 by 2
Step-by-step explanation:
The first matrix is 2 x 3; that is, it has 2 rows and 3 columns.
The second matrix is 3 x 2.
Following rules of matrix multiplication,
a 2 by 3 matrix multiplying a 3 by 2 matrix results in a product with the dimensions 2 by 2.
Bob has a garden
the area is 75 square feet
the legnth is 3 times the width
solve
75=lw
l=3w
subsitute
75=3w times w=3w^2
75=3w^2
sdivide by 3
25=w^2
square root
5=width
subsitute
3w=l
3 times 5=l
l=15
width=5
legnth=15
<h3>
Answer: c = 29</h3>
Work Shown:
Use the pythagorean theorem
a^2+b^2 = c^2
21^2 + 20^2 = c^2
441 + 400 = c^2
841 = c^2
c^2 = 841
c = sqrt(841)
c = 29
If you multiply the two numbers, you will have 36 + 78i.
*I assumed you had a typo in the first expression, it is generally written as 6 + 3i. If you meant, 6i + 3i, it should have been just 9i.
To find this product, we use the foil method.
(6 + 3i)(10 + 8i)
60 + 48i + 30i + 24i^2
60 + 78i + 24(-1)
34 + 78i
