Answer:
r = - 2.5
Step-by-step explanation:
21r - 7 - r + 5 = - 52
20r - 2 = - 52
20r - 2 + 2 = - 52 + 2
20r = - 50
20r ÷ 20 = - 50 ÷ 20
r = - 2.5
B.) f(x)=(x^2-3)^2
a.) f(x)= (x^2+6)(x^2+5)
No is your answer
Assuming that b ≠ a, the answers will not be the same.
For example, (remembering that b ≠ a) let us assume that b = 10, a = 5
10 - 5 = 5
5 - 10 = -5
5 ≠ -5
So the commutative property of subtraction does not work unless in certain cases, in which a = b.
hope this helps
Answer:
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Answer:
Cost of pencil is $0.35 and cost of pen is 0.75
Step-by-step explanation:
The cost of one pencil and one pen is required.
The cost of a pencil is $0.35 and a pen is $0.75.
The number of pens is 12.
The number of pencils is 20.
Let the cost of one pencil be
A pen costs $0.40 dollar more than pen.
So, cost of a pen is
Total cost of all the pens and pencils is $16.
Cost of pencil is $0.35 and cost of pen is 0.75
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