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Diano4ka-milaya [45]
3 years ago
10

Multiply (4 + i)(1 − 5i). 9 − 19i −1 − 19i 4 − 5i2 4 − 19i − 5i2

Mathematics
1 answer:
kenny6666 [7]3 years ago
4 0
(4 + i)(1 - 5i)

First, expand to get rid of parentheses.
4 - 20i + i + 5
Second, gather the like terms which contain the same variables. 
(4+5) + (-20i + i)
Third, add 4 + 5.
9 + (-20i + i)
Fourth, subtract -20i + i.
9 - 19i

Answer: 9 - 19i
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50% of the surface area of a piece of bread is crust what is the height
andrezito [222]
The formula for surface area is SA = 2 (wl + hl + hw). Plugging in the numbers that we know, we get SA = 2 (100 + 10h +10h). We know that the crust accounts for half of the surface area.

The surface area was not provided so this is the closest I can go without the provided surface area. I hope this helps you :)
8 0
3 years ago
Fill in the missing factor to show that 2/3 equivalent to 8/12.
Studentka2010 [4]

Answer:

4/4

Step-by-step explanation:

2/3 * what = 8/12

Multiply the top and bottom by 4/4

2/3 *4/4 = 8/12

3 0
3 years ago
Your beginning balance on your lunch account is $42. You buy lunch for $1.80 every day and sometimes buy a snack for $0.85. Afte
tangare [24]

Answer:

The answer to your question is: I bought 7 snacks

Step-by-step explanation:

Data

beginning balance = $42 = b

lunch = $1.80  = l

snack = $ 0.85  = s

final balance = $0.05 = f

                        f = b - 1.8l - 0.05s

                     0.05 = 42 - 1.8l - 0.85s

After 20 days I spent = 1.8(20) in lunches = $36

                    0.05 = 42 - 36 - 0.85s

                   0.05 = 6 - 0.85s

                  0.05 - 6 = -0.85s

                  -5.95 = -0.85s

                  s = -5.95/-0.85

                  s = 7

         

4 0
4 years ago
Why is the answer to 12x12 the same as 6x24?
allochka39001 [22]
Both sets of numbers have the same factors:

12 × 12:

= (2× 2× 3) × (2 × 2 × 3)

= 2^4 × 3^2

6 × 24

= (2 × 3) × (2 ×2 × 2 × 3)

= 2^4 × 3^2


4 0
3 years ago
Read 2 more answers
Zeth has $32.12 in his change
d1i1m1o1n [39]
The answer is $8.43 for this question
8 0
3 years ago
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