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bearhunter [10]
2 years ago
11

What is the sum of √-2 and √-18? O 4√2 O 4√21 O 5√2 O 5√21

Mathematics
1 answer:
Deffense [45]2 years ago
6 0

Answer:

4 \sqrt{2}  \: i

Step-by-step explanation:

\sqrt{ - 2}  +  \sqrt{ - 18}  \\ ( \sqrt{2}  \times  \sqrt{ - 1} ) + ( \sqrt{18}  \times  \sqrt{ - 1} ) \\ ( \sqrt{2}  \times  \sqrt{ - 1} ) + (3 \sqrt{2}  \times  \sqrt{ - 1} ) \\  \sqrt{2} i + 3 \sqrt{2} i \\  = 4 \sqrt{2} i

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Circle O has a circumference of approximately 2507 ft.
ELEN [110]

Answer:

80 ft (b)

Hope it helps

Step-by-step explanation:

Circumference= π * diameter

Since the circumference is given..

250 = πd

d = 250/π

= 250/3.14

= 79.6

= 80 feet approx

3 0
3 years ago
5. An angle bisector of a triangle divides the opposite side of the triangle into segments 6 cm and 5 cm long. A second side of
AlladinOne [14]
You have to set up 2 proportions.

If the 6.9 goes with the 5 then the proportion will look like this.
6.9/5 = x/6 Cross multiply
6 * 6.9 = 5x
41.4 / 5 = x
x = 8.28 or 8.3

If on the other hand the 6.9 goes with the 6 then the second proportion is
6.9/6 = x/5
6.9 * 5 = 6X
34.5 / 6 = x
x = 5.75

Answer: D <<<<<<<<======

6 0
4 years ago
the sum of two numbers is 57. If the larger number is three less than twice the smaller number find both numbers
bearhunter [10]

Answer:

Step-by-step explanation:

x = larger number, y = smaller number

x + y = 57

x = 2y - 3

2y - 3 + y = 57

3y - 3 = 57

3y = 57 + 3

3y = 60

y = 60/3

y = 20 <=== the smaller number

x = 2y - 3

x = 2(20) - 3

x = 40 - 3

x = 37 <=== the larger number

3 0
3 years ago
Read 2 more answers
A man travels from town X to town Y at an average rate of 60 mph and returns at an average rate of 50 mph. He takes a 1/2 hour l
yawa3891 [41]
<span>Distance = d miles ; rate = 60 mph ; time = d/60 hrs

distance = d miles ; rate = 50 mph ; time = d/50 hrs
----------------------
Round-trip DATA:
distance = 2d miles ; rate = 55 mph ; time = (2d)/55 hrs
-----------------------------------------------------------
Equation:

Roundtrip time - other time = -1/2 hr
(2d)/55 - [(d/60)+(d/50)] = -1/2
(2d)/55 - [(110d)/(50*60)] = -1/2
---
600(2d) - 11[110d] = -16500
1200d - 1210d = -16500
-10d = -16500
distance = 1650 miles

Hope this helped :)</span>
3 0
3 years ago
Read 2 more answers
What is 3 root of 125
olga2289 [7]
Hey there, 125/5=25 and 25*5=125, Therefore, ∛125=5
8 0
3 years ago
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