Answer: 20
Step-by-step explanation: Just took the quiz
The second one is the correct answer. Plug in -3 into the equation.
Answer:
138
Step-by-step explanation:
There is 60 seconds in a minute, so if the heart beats 23 times in 10 seconds, it is 138 bpm.
23 * 6 = 138
We can use the distributive property to simplify this expression.
I split this up into different parts--it helps me visualize better.
To begin, "-2m(m + n - 4)" becomes "-2m^2 - 2mn + 8m"
Then, "5(-2m + 2n)" becomes "-10m + 10n"
Finally, "n(m + 4n - 5)" becomes "mn + 4n^2 -n"
We can then simplify even further by combining like terms. The final expression is: C
Hope this helps!
Answer:
x³ -x²-30x+72
Step-by-step explanation:
→ ( x - 3 ) ( x - 4 ) ( x + 6 )
[ expand and open brackets ]
→ ( x² -4x -3x + 12 ) ( x + 6 )
[ simplify ]
→ ( x² -7x + 12 ) ( x + 6 )
[ expand ]
→ x³ +6x² -7x² - 42x + 12x + 72
[ simplify/ final answer ]
→ x³ -x² -30x +72
