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kotykmax [81]
2 years ago
15

50 POINTS only answer if u know 100% Evaluate the expression 3.14(a^2 + ab) when a = 3 and b = 4.​

Mathematics
1 answer:
xeze [42]2 years ago
6 0

Answer: 65.94

Step-by-step explanation:

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In a naval engagement, one-third of the fleet was captured, one-sixth was sunk, and two ships were destroyed by fire. One-sevent
Otrada [13]

Answer:

60 ships.

Step-by-step explanation:

Let the total number of ships in the naval fleet be represented by x

One-third of the fleet was captured = 1/3x

One-sixth was sunk = 1/6x

Two ships were destroyed by fire = 2

Let surviving ships be represented by y

One-seventh of the surviving ships were lost in a storm after the battle = 1/7y

Finally, the twenty-four remaining ships sailed home

The 24 remaining ships that sailed home =

y - 1/7y = 6/7y of the surviving fleet sailed home.

Hence

24 = 6/7y

24 = 6y/7

24 × 7/ 6

y = 168/6

y = 28

Therefore, total number of ships that survived is 28.

Surviving ships lost in the storm = 1/7y = 1/7 × 28 = 4

Total number of ships in the fleet(x) =

x = 1/3x + 1/6x + 2 + 28

Collect like terms

x - (1/3x + 1/6x) = 30

x - (1/2x) = 30

1/2x = 30

x = 30 ÷ 1/2

x = 30 × 2

x = 60

Therefore, ships that were in the fleet before the engagement were 60 ships.

3 0
3 years ago
=) The perimeter of a rectangular field is 336 m.
goldenfox [79]

Answer:

Length of the field: 94 m

Width of the painting: 61 cm

Step-by-step explanation:

Use the perimeter formula, P = 2l + 2w, to find the length:

Plug in the perimeter and width into the equation:

P = 2l + 2w

336 = 2l + 2(74)

336 = 2l + 148

188 = 2l

94 = l

So, the length of the field is 94 m.

To find the width of the painting, use the area formula, A = lw

Plug in the area and length into the equation:

A = lw

5795 = 95w

61 = w

So, the width of the painting is 61 cm.

Length of the field: 94 m

Width of the painting: 61 cm

4 0
3 years ago
Solve the proportion/percent problem:
Shtirlitz [24]

The change that Angie will receive from an $100 bill is $38.944.

<h3>How to calculate the value?</h3>

Angie went to the store and bought 3 pairs of tennis shoes that each cost $24. The total cost will be:

= 3 × $24 = $72

Sales tax was then calculated at 6%. This will be:

= 6% × $72

= $4.32

Total cost = Cost + Tax

= $72 + $4.32

= $76.32

Coupon off = 20% × $76.32 = $15.264

Total amount paid = Cost - Coupon

= $76.32 - $15.264

= $61.056

The change gotten will be:

= $100 - $61.056

= $38.944

Learn more about money on:

brainly.com/question/24373500

#SPJ1

3 0
1 year ago
Quadrilateral ABCD is a square. BC = 10 What is the length of AC? A. 10 sqrt 2 B. 20 sqrt 3 C. 10 sqrt 3 D. Sqrt 100
bixtya [17]

A is the correct answer to this question because AC and BC differ because the B must be changed to an A.

4 0
4 years ago
Two angles are supplementary if the sum of their measures is 180. If one angle’s measure is 45 more than 3 times the other angle
faust18 [17]

Assuming the two angles are supplementary, the angle measuring x is equal to 33.75, and the angle measuring 3x+45 is equal to 146.25.

Step-by-step explanation:

x+(3x+45)=4x+45=180

4x+45=180

-45 -45

4x=135

÷3 ÷3

x=33.75

3x+45=146.25

7 0
3 years ago
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