All categories

3 years ago

Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 3. (Input decimals only, such as 12.71, as the answer.

Mathematics

2 answers:

bezimeni [28]3 years ago

7 0

Answer:

Given,

a=4

b=3

Nowz

 $3.14( {a}^{2} + ab) \\ = 3.14( {4}^{2} + 4 \times 3) \\ = 3.14(16 + 12) \\ = 3.14 \times 28 \\ = 87.92$ 

hope this helps .

Good luck on your assignment...

kondaur [170]3 years ago

6 0

Answer:

87.92

Step-by-step explanation:

3.14(a²+ab)=

Plugging in values for a and b

3.14(4²+4×3)=

3.14(16+12)=

3.14(28)=

87.92

You might be interested in

the angles of a triangle are in the ratio 3:4:5. what is the degree measure of the smallest angle of the triangle?

Alik [6]

A triangle interior angles add up to 180

so we have 3:4:5
the ratio of the angles
3+4+5=12
therefor 180=12 units
divide by 12
15=1 unit
subsitute
find the smallest unit
3
3 times 15=45
answer is 45 degrees

6 0

3 years ago

A family buys a car for $20,000. The value of the car decreases about 20% per year. After 6 years, the family decides to sell th

Ugo [173]

Answer:

Step-by-step explanation:

The car starts at 20 000

After 1 year, it's worth 18 000

After 2 years, it's worth 14 400

After 3 years, it's worth 11 600

After 4 years, it's worth 9 280

After 5 years, it's worth 7 424

After 6 years, it's worth 5 975.20

No, the family should not sell the car for 4000

3 0

2 years ago

Six more than five times a number is at least twenty-one

kakasveta [241]

Lets say the number is x so we can make an equation
If is at least 21, that means it has to be greater then or equal to it.
6+5*x>=21
You can subtract 6 from both sides
5*x>=15
Then divide both sides by 5
x>=3
You can conclude that the number is greater then or equal to 3.

6 0

3 years ago

Six decreased by five times a number

Lapatulllka [165]

6 - 5x

the number isn't specific so u'll need to use a variable for it

u're multiplying that number by 5 so u'll write it as 5x

and ur subtracting it from 6

4 0

2 years ago

Read 2 more answers

Please answer i give 20 points

kherson [118]

Answer:

amount saved

Step-by-step explanation:

now i need twenty points

5 0

2 years ago