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Ad libitum [116K]
3 years ago
15

Ab - 0.5b when a = 1 and b = 5

Mathematics
2 answers:
Korolek [52]3 years ago
4 0

Answer:

2.5

Step-by-step explanation:

a = 1

b = 5

ab

= 1 x 5

= 5

0.5b

= 0.5 x 5

= 2.5

ab - 0.5b

= 5 - 2.5

= 2.5

umka2103 [35]3 years ago
3 0

Answer:

2.5

Step-by-step explanation:

ab - 0.5b

a = 1 and b = 5

(1)(5) - 0.5(5)

Multiply (1)(5) = 5

5 - 0.5(5)

Multiply -0.5(5) = -2.5

5 - 2.5

Subtract 5 - 2.5 = 2.5

2.5

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Multiplying 20 by 320% is the same thing as multiplying 20 by 3.2, or 20(3.2)=64. Hope this helped!
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4 years ago
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the sum of three numbers is 55. the second number is twice the first and the third number is five less than the second. What are
ArbitrLikvidat [17]

Let the first number be = x

Then the second number = 2x

The third number = 2x - 5

Their sum = 55

This can be written in an equation as =

x + 2x + 2x - 5 = 55

= x + 2x + 2x = 55 + 5 ( transposing -5 from LHS to RHS changes -5 to +5 )

= x + 2x + 2x = 60

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The first number = x = 12

The second number = 2x = 2 × 20 = 24

The third number = 2x - 5 = 24 - 5 = 19

Therefore , the three numbers are 12 , 24 and 19 .

5 0
3 years ago
Luke buys a certain brand of cereal that costs $11 per box. Luke changes to a super-saving brand of the same size. The equation
Mkey [24]

Answer:

Part A:

Luke's original box of cereal costs $2 more than the super-saving brand.

y=9(1) 

y=9

11-9=2

Part B:

y=9(6)

y=54

11x6=66

66-54=12

Luke saves $12 each month if he buys 6 boxes of the super-saving brand. 

pls mark brainliest

8 0
3 years ago
What is 12 more than 8.2 times a number n
pantera1 [17]
12 more than 8.2 times a number n is the same as “8.2n + 12”.
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Answer:

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Step-by-step explanation:

hellolkmlkmkjjjjjjjjjjjjjjjjjjjjj

6 0
3 years ago
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