What is the justification for each step in the solution of the equation?
2 answers:
13x−4=−36−27x+12: Distributive property
13x−4=−24−27x: Combine like terms
40x=−20: Addition Property of equality
<h2>
Answer with Step-by-step explanation:</h2>
13x−4= −9(4+3x)+12 (Given)
13x−4= −36−27x+12 (Distributive property: -9(4+3x)= -36-27x)
13x−4= −24−27x (combining like terms on each side: -36+12= -24)
40x−4=−24 (Addition Property of Equality: adding 27x on both sides
)
40x= −20 (Addition Property of Equality: adding 4 on both sides
)
x= −1/2 (Division Property of Equality: dividing both sides by 40)
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F(x) = x² - 8x + 5
f(-1) = (-1)² - 8*(-1) + 5
= 1 + 8 + 5 = 14
f(-1) = 14.
7+ 3x= -8
-8-7=-15
-15 divided by 3= -5
-5 is the answer
Answer:
Step-by-step explanation:
The explanation is pinned.
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<span>Given:
xbar = 20 min
standard deviation = 8 min
total sample = 240
Required:
how many gym members are expected to spend 4 min and 36 min on a treadmill today
Solution:
sd</span>² = (∑(x - xbar)²) / N - 1
there are 42 gym members at 4 minutes and 200 gym members in 36 minutes.
