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SSSSS [86.1K]
3 years ago
14

I need some help. Please

Mathematics
1 answer:
Ilya [14]3 years ago
7 0

Are you able to ask your teacher?

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Which property is illustrated by the statement 13x12=12x13
finlep [7]
Oooh I don't know the exact wording, but it is the property that states that the order of the numbers in the equation can be switched and still equal the same thing as long as the signs are still kept.
8 0
3 years ago
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the radius of a cylindrical construction pipe is 2 ft. If the pipe is 26 ft long, what is its volume?
Mamont248 [21]
Thxr2x26=

3.14x2x2x26= 326.56 ft3
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3 years ago
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Determine how long it will take an object to rotate through 20.0 revolutions at an angular velocity of 2.8 radians per second. U
Andreyy89
The conversion factor between radians and revolution as measures of angle is 2π rad is equal to 1 revolution. Converting the given angular velocity to rev/s,
                (2.8 rad) x (1 rev / 6.28 rad) = 70/157 revolution per second
Dividing the given angle, 20 rev by the velocity,
                                 (20 rev) / (70/157 rev/s) = 44 6/7 s
Thus, the answer is approximately 44.9 seconds. 
5 0
3 years ago
Resolver la siguiente ecuación por eliminación o sustitución: a-8b= -9 a-2b= -7
Crazy boy [7]

Answer: Solution: a=\dfrac{-19}{3} and b=\dfrac{1}{3} .

Step-by-step explanation:

The given pair of equations:

a-8b= -9\ ...(i)\\\\ a-2b= -7\ ...(ii)

Eliminate equation (i) from (ii) , we get

-2b-(-8b)=-7-(-9)\\\\\Rightarrow\ -2b+8b=-7+9\\\\\Rightarrow\ 6b=2\\\\\Rightarrow\ b=\dfrac{1}{3}

Put value of b in (ii) , we get

a-2\times\dfrac{1}{3}=-7\\\\\Rightarrow\ a=-7+\dfrac{2}{3}\\\\\Rightarrow\ a=\dfrac{-21+2}{3}\\\\\Rightarrow\ a=\dfrac{-19}{3}

Solution: a=\dfrac{-19}{3} and b=\dfrac{1}{3} .

4 0
3 years ago
there are 50 people in a class out of this number 1/10 speak French only and 4/5 of the remainder speak both French and English
Flura [38]

Answer:

36 students speak both english and french

14 students speak only english

7 0
3 years ago
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