MATHEMATICS HIGH SCHOOL

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

Answers

Answer 1
Answer: (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
Answer 2
Answer:

Answer:

OTHER PERSON IS CORRECT ITS 9 - 19i

I would give an explanation but they said it!!

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Use your knowledge of similar triangles to solve for x

Answers

9514 1404 393

Answer:

  x = 10 2/3

Step-by-step explanation:

The ratios of corresponding sides are the same, so we have ...

  x/8 = 8/6

  x = 8·(8/6) = 64/6

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Based on the graph, which statement is correct about the solution to the system of equations for lines K and J?(1, 1) is the solution to both lines K and J.
(−1, 0) is the solution to line K but not to line J.
(1, 1) is the solution to line K but not to line J.
(0, 4) is the solution to both lines K and J.

Answers

The answer is (1,1) since that is where J and K intersect.

Shelly ran 21/4 miles. Lynne ran 31/8 miles. Who ran farther and by how much

Answers

 Lynne ran farther by 7/8 miles.
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How do you solve 1 3/4-7/10?

Answers

1 3/4 - 7/10 = 1 (15 - 14)/20 = 1 1/20

Juanita is 13 years older than her cousin. The sum of their ages is no less than 103 years. Enter an inequality that can be used to represent this situation in the first box, where x represents Juanita's cousin's age. Enter the youngest age Juanita's cousin can be in the second box.

Answers

y = x + 13
y + x ≥ 103
x + 13 + x ≥ 103
Inequality is:
2 x + 13 ≥ 103
2 x ≥ 103 - 13
2 x ≥ 90
x ≥ 90 : 2
x ≥ 45
The youngest age Juanita`s cousin can be is 45.

Answer:

45

Step-by-step explanation:

The drawing of a building, shown below, has a scale of 2 inches to 8.5 feet.What is the actual height, in feet, of the house?

Answers

Answer:

36 1/8 feet

Step-by-step explanation:

x = height of house in feet

2"/8.5' = 8/5"/x

cross-multiply:

2x = 72.25

x = 36.125 or 36 1/8
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