Please help What is the value of this expression when a = 7 and b = -4? |2a| - b/ 3

Mathematics

1 answer:

belka [17]3 years ago

3 0

Answer:

46/3

Step-by-step explanation:

|2a| - b/3

Plug in the values and evaluate.

|2(7)| - (-4)/3

|14| + 4/3

Apply | a | = a

14 + 4/3

42/3 + 4/3

= 46/3

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Part 1)There are 100 cm in 1 m and 1000 m in 1 km. You need a curtain for a window that is 156 cm wide.

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we know that
100 cm------> 1 m
1000 m-----> 1 km

step 1
convert cm to m
156 cm---------> 156*(1/100)-----> 1.56 m

step 2
convert m to km
1.56 m------> 1.56*(1/1000)----> 0.00156 km

step 3
find the factor
156 cm---------> 156*(1/100)*(1/1000)---> 156*[1/100000]=0.00156 km

the answer part 1a) is
the conversion factor is (1/100000)

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the answer Part 1b) is 1.56 km

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Part (a) Write an expression for the total cost of a taxi ride.

let
x-----> quantity of minutes of a taxi ride
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we know that
y=2x+3

the answer Part) 2a is
An expression for the total cost of a taxi ride is
y=2x+3

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for x=18 minutes
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the answer Part 2b) is
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(b) Triangular prism
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see the attached figures