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Sergeu [11.5K]
2 years ago
14

Evaluate the expression 4ab, for a =2 and b = 5

Mathematics
2 answers:
yan [13]2 years ago
4 0

Answer:

40

Step-by-step explanation:

4x2=8

8x5=40

expeople1 [14]2 years ago
3 0

Answer:

40

Step-by-step explanation:

you do this 4(a*b)

ab is 10 so 4*ab=40

hint (if you see two variables without a symbol in between,  multiply)

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X + 1/2 = 17 need help fast
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Answer:

x=16.5

Step-by-step explanation:

-1/2 on both sides

17-0.5 or 1/2=16.5

7 0
3 years ago
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a pentagon is a regular pentagon that has 5 sides, so each side has the same length that is (x - 1.5)cm. The perimeter is 22.5 c
Ivanshal [37]

Answer:

Step-by-step explanation:

5(x - 1.5) = 22.5

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8 0
3 years ago
how many minutes is it before 12 noon if 20 minutes ago it was three times as many minutes after 9 am
Hunter-Best [27]
First, change everything into minutes.
12 noon is 12 by 60 which = 720 minutes.
9am is 9 by 12 which = 540 minutes.
X is now your number of minutes before noon.So noon - x is the next step:
720 - x
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720 - x - 20= 540 + 3x (3x because you're looking for 3 times as many minutes)
720 - 20 - 540=4x (you combine all the like numbers and variables) 
160 = 4x
160/4= x
40 = x
Your answer is 40 minutes
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7 0
3 years ago
Dewan’s bank account balance is -$16.75. He deposits checks totaling $23.59. What is his new balance?
Brilliant_brown [7]

Answer:

b because 23.59+ (-16.75) = 6.84

Step-by-step explanation:

7 0
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