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Mathematics

1 answer:

Lady bird [3.3K]2 years ago

6 0

Answer:

65.63 cm or 65 5/8 cm

Step-by-step explanation:

volume of a rectangular prism = whl

w= 7 1/2

h = 2 1/2

l = 3 1/2

w x h x l

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What is the volume of a cylinder with base radius 2 and height 9?

astraxan [27]

113.04 is the volume

V = pi x r^2 x h

3.14 x 2^2 x 9 = 113.04

8 0

3 years ago

2m² + 10 for m = -6 Help please

lbvjy [14]

Answer:

Step-by-step explanation:

2×m²+10

m²= -6×-6=36

36×2=72+10=82

7 0

2 years ago

Read 2 more answers

i need help with number 7. its solving systems of equations by substitution. please show work!!! i need help

SIZIF [17.4K]

#7:
Subtract y from both sides:
-4x=6-y

Divide both sides by -4:

Answer:
x= -6-y/4

#7 part 2:

Add y to both sides:
-5x=21+y

Divide both sides by -5:

Answer: x=-21+y/5

hope i helped!

7 0

2 years ago

Find x A. 22√2 B. 22 C. 11√3/3 D. 11√3

mel-nik [20]

Answer

$22\sqrt{2}$

Step-by-step explanation:

First we gave a name to the side that is common for both triangles, can be Y for example.

Using trigonometric functions we can make a relationship between the two angles that we have and the magnitud of the side.

$sin(45)=\frac{11}{Y} \\$ , Because sin(x)= op/hip

$cos(60)=\frac{Y}{x}$ , Because con(x)=ad/hip

Having this equations, we can solve the system and find x

$Y=\frac{11}{sin(45)} \\Y=cos(60)*x$

we equal Y and solve

$\frac{11}{sin(45)}=cos(60)*x\\ x=\frac{11}{sin(45)*cos(60)} \\x=\frac{11}{\frac{\sqrt{2} }{2} *\frac{1}{2} } \\x=\frac{11}{\frac{\sqrt{2} }{4} } \\x=\frac{44}{\sqrt{2} }\\$