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pashok25 [27]
3 years ago
8

Help me please I am so sad

Mathematics
1 answer:
Mashcka [7]3 years ago
6 0

Answer:B 8;45

Step-by-step explanation:

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Find the perimeter of the
spayn [35]
D is the right answer
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2 years ago
Find all solutions to the equation in the interval [0, 2π). cos 2x - cos x = 0
Jlenok [28]
This is the concept of algebra, to solve the expression we proceed as follows;
cos 2x-cosx=0
cos 2x=cosx
but:
cos 2x+1=2(cos^2x)
thereore;
from:
cos 2x=cos x
adding 1 on both sides we get:
cos 2x+1=cos x+1
2(cos^2x)=cosx+1
suppose;
cos x=a
thus;
2a^2=a+1
a^2-1/2a-1/2=0
solving the above quadratic we get:
a=-0.5 and a=1
when a=-0.5
cosx=-0.5
x=120=2/3π
when x=1
cos x=1
x=0
the answer is:
x=0 or x=2/3π

4 0
3 years ago
Read 2 more answers
Find the volume of a cube that has the following dimensions:length=2x^2 width=x^3 height=x^2-6x+5 A) 4x^7-3x^6+8x^5 B) 2x^12-12x
fomenos

Answer:

Option D. 2x⁷ - 12x⁶ + 10x⁵

Step-by-step explanation:

From the question given:

Length (L) = 2x²

Width (w) = x³

Height (h) = x² - 6x + 5

Volume (V) =?

Volume (V) = length (L) x width (w) x height (h)

V = L x w x h

V = 2x² × x³ × x² - 6x + 5

V = (2x²) (x³) (x² - 6x + 5)

V = (2x⁵) (x² - 6x + 5)

Clear bracket

V = 2x⁷ - 12x⁶ + 10x⁵

Therefore, the volume of the cube is 2x⁷ - 12x⁶ + 10x⁵

4 0
3 years ago
Marty’s dog can run 3 miles in 20 minutes. What is the dog’s speed in miles per hour?
stich3 [128]
9mph because 20 minutes time 3 is one hour so multiply 3 by 3 to get 9
7 0
3 years ago
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Which pair of words is the ODD one out. A. sister-brother, B. wife-husband, C. teacher-student or D. princess-prince
wel

Answer:

C. teacher-student

Step-by-step explanation:

the pattern is girl, boy, girl boy, and teacher and student don't have a gender connection

8 0
3 years ago
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