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Tema [17]
3 years ago
5

Which point on the number line below best represent 30

Mathematics
2 answers:
Hatshy [7]3 years ago
7 0

Answer:

l

Step-by-step explanation:

san4es73 [151]3 years ago
5 0
Where’s the number line?
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Solve the following equation
Ulleksa [173]

Answer:

n = 20

Step-by-step explanation:

n/2 - 9 = 1

Add 9 to each side

n/2 -9+9 = 1+9

n/2 = 10

Multiply by 2 on each side

n/2*2 = 10*2

n = 20

6 0
3 years ago
Evaluate the discriminant of the equation. Tell how many solutions each equation has and whether the solutions are real or imagi
cupoosta [38]

Answer:

D=-4<0, the equation has no real solutions, it has two imaginary solutions.

Step-by-step explanation:

The quadratic equation x^2 +4x+5=0 has coefficients

a=1,

b=4,

c=5.

The discriminant D is the expression

D=b^2-4ac.

Hence,

D=4^2-4\cdot 1\cdot 5=16-20=-4

Since the discriminant is negative, the equation has no real solutions, it has two imaginary solutions.

4 0
3 years ago
Read 2 more answers
Find sin x/2, cos x/2, and tan x/2, if cos x = -12/13, 180 degrees is less than x which is less than 270 degrees
Rashid [163]
Cos x = -12/13
sin x = -sqrt(13^2 - 12^2) / 13 = -5/13
tan x = 5/12

tan x/2 = (1 - cos x) / sin x = 1 - (-12/13) / -5/13 = 25/13 * -13/5 = -5

2sin^2 x/2 = 1 - cos x = 1 - (-12/13) = 25/13
sin^2 x/2 = 25/13 / 2 = 25/26
sin x/2 = 5/√26

sin x/2 / cos x/2 = tan x/2
cos x/2 = sin x/2 / tan x/2 = 5/√26 / -5 = -1/√26

sin x/2 = 5/√26
cos x/2 = -1/√26
tan x/2 = -5
5 0
3 years ago
What is the surface area of the rectangular prism?
Sunny_sXe [5.5K]
10cm is the correct answer
8 0
2 years ago
Read 2 more answers
-x+7y=51<br> -x-4y=-26<br> What is the solution to the system of Elmination
ryzh [129]

Answer:

number one is maybe 44 because -44x + 7y is 51 and number 2 is 30 because 30 - 4 is 26 I don't really know let me know if its wrong

4 0
3 years ago
Read 2 more answers
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