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3 years ago

Pleaseeeeeee helppppppp

Mathematics

2 answers:

Alekssandra [29.7K]3 years ago

5 0

Answer:

$\boxed{Option \ D}$

Step-by-step explanation:

The combination of a rational number (3) and an irrational no. ( $4i$ ) is called a complex number.

So,

$3+4i$ is a complex no.

Elden [556K]3 years ago

3 0

Answer:

D. Complex number.

Step-by-step explanation:

This number is not irrational, since 3 is rational.

The number is not entirely rational, since 4i is irrational.

The number is not real because i is not real.

So, the number is a Complex number, since it includes both real and nonreal numbers.

Hope this helps!

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Find the slope of the line through the given points (-3,-5) and (1, -1)

Sonja [21]

Answer: (4,4)

Step-by-step explanation:

You have to make a graph then pinpoint (-3,-5) and (1,-1). Then count how mapny units up till you get to (-3,-1) (which is 4) then count to the right 4 units and you should land on (1,-1). Calculate how many times you moved units.

6 0

3 years ago

(Will give Brainliest/5 stars for correct answer)

MariettaO [177]

By asking on Brainly, you clearly don't care how you get the answer.

The part of interest is the law of sines tells you
.. A = arcsin((12/11)*sin(46°)) = 51.7° . . . or . . . 180°-51.7° = 128.3°
.. c = 11*sin(82.3°)/sin(46°) ≈ 15.2 . . . or . . . sin(5.7°)/sin(46°) ≈ 1.5

Selection D is appropriate.

7 0

3 years ago

The height of a triangle is 8ft greater than the base. The area of the triangle is 136.5 square ft. Find the length of the base

mixer [17]

Answer:

the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

Step-by-step explanation:

Note that the formula for the area of a triangle is A = (1/2)(base)(height). Let's abbreviate that to A = (1/2)(b)(h). We are told that h = b + 8.

Then A = 136.5 = (1/2)(b)(b + 8), or

(after multiplying both sides by 2)

A = 273 = b^2 + 8b

which, when put into standard quadratic form, becomes:

b^2 + 8b - 273 = 0

The coefficients of this quadratic are a = 1, b = 8 and c = -273.

Thus, the discriminant is b^2 - 4ac, or 64 - 4(1)(-273) = 1156 = 17^2.

The roots are then

-8 ± √1156 -8 ± 17

x = -------------------- = ------------ = 9/2 and -25/2

2 2

Only the root 9/2 makes sense here, because measurements of length are positive.

Thus, the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

3 0

4 years ago

your car gets about 30 miles per gallon. you are planning to drive to see your friends who live at 930 miles away. how many gall

Mila [183]

Since you need to go there and back multiply 930 by 2. 930*2=1,860. Divide 1,860 by 30 to get 62. You need 62 gallons of gas to get to your friends house and back. I hope this helps! ;)

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4 years ago

In basketball, the number of points you score is given by 3x + 2y + 1z where x is three-pointers, y is two-pointers, and z is fr

alexandr402 [8]

25 total points. You use the equation and subsitute the variable. 3 three-pointers is 3•3 when you make x three. 5 two-pointers is 2•5 when you make y five. 6 free throws is 1•6 where 6 becomes z. The final equation is (3•3) + (2•5) + (1•6). Then you get 9+10+6 which eqauls 25

7 0

3 years ago