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Over [174]
3 years ago
15

Train A and train B leave the central station at the same time.They travel the same sped,but in opposite directions,with train A

heading towards station A, and train B heading Towards station B.Train A reaches station A after
2 1/2 h.Train B reaches station B after 4h.Station A and B are 585 mi apart

What is the rate of the trains?

—— mph
Mathematics
1 answer:
Shtirlitz [24]3 years ago
5 0

Train B reaches station B after 312 h

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Using all the rest of my points on this all just here for points answers will be reported
Semenov [28]
So the volume of the cylinder = pi r^2 * h
Height = 4 feet tall
Radius = 1 foot
So just do pi * 1^2 * 4
3.14 x 1^2 x 4 = 12.56 cubic feet
6 0
2 years ago
Read 2 more answers
Solve the following system by any method -8x-8y=0 -8x+2y=-20
iVinArrow [24]
                     \fbox{Solution by using Matrix} 

\text{Linear Equation} = -8x-8y=0 , -8x+2y=-20

\text{Rewrite the linear equations above as a matrix} 

\left[\begin{array}{ccc}8&-8&0\\-8&2&-20\\\end{array}\right] 

\text{Apply to Row2 : Row2 + Row1} 

\left[\begin{array}{ccc}8&-8&0\\-8&-6&-20\\\end{array}\right] 

\text{ Simplify rows} 

\left[\begin{array}{ccc}8&-8&0\\0&1&10/3\\\end{array}\right] 

\text{Note: The matrix is now in echelon form.}\text{The steps below are for back substitution.} 

\text{Apply to Row1 : Row1 + 8 Row2} 

\left[\begin{array}{ccc}8&0&80/30\\0&1&10/3\\\end{array}\right] 

\text{ Simplify rows}  

\left[\begin{array}{ccc}1&0&10/3\\0&1&10/3\\\end{array}\right] 

\text{Therefore, the solution is} 

x= \dfrac{10}{3} \ \text{and} \ \ y=\dfrac{10}{3}
7 0
3 years ago
I asked before and didn’t get an answer I really don’t understand this thanks.
dmitriy555 [2]
The answer is D, because that is what you should get when you multiply it out.

4x^2 times x^2 = 4x^4 because...

1) multiply the 4 and the one in front of the x on the second term = 4 then

2) multiply x^2 times x^2 to get x^4, not x^3, so you can immediately eliminate A and B to save time.

Now let's deal with the second part..."may or may not be" part

A polynomial is an expression with more than two algebraic terms

terms are like...
2x + 3y ---there's two terms there, eventhough the 2 and x are multiplied, it doesn't count (same with the 3 and y)
since it only have two terms, not more than two terms, it is called a binomial, not polynomial. I think that's what they mean by that

one term with a variable (y,x,and so on) is called a monomial

one term with no var is called a constant

there's many more but hope this gave you some help
3 0
3 years ago
Read 2 more answers
Which angle is supplementary to DBE?<br><br><br> A. DBC<br> B. DBA<br> C. EBH<br> D. BGH
Degger [83]
It is B because angle DBA is supplementary to angle DBE because together they create a straight line which equals 180 degrees.
4 0
2 years ago
Which statement illustrates the Distributive Property of scalar multiplication? (Assume that A and B are matrices and c and d ar
olasank [31]

Answer:

C. cA-cB=c(A-B)

Step-by-step explanation:

Given that A and B are matrices and c is a scalar, then the distributive property of scalar multiplication over addition is given by;

c(A+B)=cA+cB

The distributive property of scalar multiplication over subtraction is

c(A-B)=cA-cB

The correct answer is C.

5 0
3 years ago
Read 2 more answers
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