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3 years ago

Which expressions is equivalent to 2r+(t+r)

Mathematics

1 answer:

azamat3 years ago

8 0

Answer:

t+3r

Step-by-step explanation:

This is a one step solution

All you do is add like terms

In this case the only like terms are the varibles r

2r+(t+r)

so if you add all of the rs together there would be 3rs

So the rest of the problem would continue as normal while bringing the 3r to the end

t+3r

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a+solution+of+salt+and+water+contains+75+grams+of+water+per+150+mililiters+of+the+solution.+if+1+mole+of+water+weighs+16+grams,+

bazaltina [42]

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3 years ago

Algebraically determine if the relation y = x3 − 4x is symmetric with respect to the x-axis, y-axis, the origin or has no symmet

Gala2k [10]

$\bf y=x^3-4x
\\\\\\
\textit{check for y-axis symmetry}\\\\
\stackrel{x=-x}{y=(-x)^3-4(-x)}\implies y=(-x)(-x)(-x)+4x\implies \boxed{y=-x^3+4x}
\\\\\\
\textit{checking for x-axis symmetry}\\\\
\stackrel{y=-y}{(-y)=x^3-4x}\implies -y=x^3-4x\implies \boxed{y=-x^3+4x}
\\\\\\
\textit{checking for origin symmetry}\\\\
\stackrel{x=-x\qquad y=-y}{(-y)=(-x)^3-4(-x)}\implies -y=(-x)(-x)(-x)+4x
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-y=-x^3+4x\implies y=\cfrac{-x^3+4x}{-1}\implies \boxed{y=x^3-4x}\quad \checkmark$

notice, if you replace x = -x and y = -y accordingly for each test for symmetry, if the resulting function, is equal to the original function, then it has that type of symmetry.

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3 years ago

Find the area of the circle shown.

BigorU [14]

Answer:

okay so the area is 8.478cm2

4 0

2 years ago

Divide a number by 7, and then subtract 4 from the quotient

Ronch [10]

Y = (x/7) - 4; this would be the equation, assuming x is the number.

3 0

3 years ago

Read 2 more answers

A car travels 15 km in 13 minutes. What is its average speed in km/h?

Bogdan [553]

Answer:

69.45 km/h

Step-by-step explanation:

Speed = Distance/Time
=> Speed = 15 km ÷ 13/60
=> Speed = 15 km ÷ 0.216
=> Speed = 15 km/0.216
=> Speed = 15 x 4.63/0.216 x 4.63
=> Speed = 69.45 km/1 h (Approximate)

<u>Conclusion:</u>

Therefore, the speed is 69.45 km/h (Approximate)

Hoped this helped.

3 0

3 years ago