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1 year ago

Please help me with these

Mathematics

2 answers:

Charra [1.4K]1 year ago

8 0

Hope you could understand.

If you have any query, feel free to ask.

Leona [35]1 year ago

8 0

Answer:

iii. a

iv. d

Step-by-step explanation:

iii.

Area Small Semicircles:

(3.14)(3)²
3.14(9)
28.26

Area Large Semicircles:

(3.14)(14.5)²
(3.14)(210.25)
660.185

Area rectangle:

6 * 29
174

Area Garden:

28.26 + 660.185 + 174
862.445 ≈ 862

Units: m²

A = $\boxed{862} \text{m}^2$

iv.

Area Field :

600m * 400m = 240000 m²

Price per m² = ₹2.50

Total Price :

240000 * ₹2.50 = 6,00,000

P = ₹ $\boxed{6,00,000}$

-Chetan K

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Write a system of equations that can be solved to find the number of packets of strawberry wafers and the number of packets of c

Soloha48 [4]

Answer:

x = number of packets of strawberry wafers = 4 packets

y = number of packets of chocolate wafers = 18 packets

Step-by-step explanation:

Devon and his friends bought strawberry wafers for $3 per packet and chocolate wafers for $1 per packet at a carnival. They spent a total of $30 to buy a total of 22 packets of wafers of the two varieties.

Part A: Write a system of equations that can be solved to find the number of packets of strawberry wafers and the number of packets of chocolate wafers that Devon and his friends bought at the carnival. Define the variables used in the equations. (5 points)

Part B: How many packets of chocolate wafers and strawberry wafers did they buy? Explain how you got the answer and why you selected a particular method to get the answer. (5 points)

Let

x = number of packets of strawberry wafers

y = number of packets of chocolate wafers

x + y = 22

3x + y = 30

B. Solve the equation in A using elimination method

x + y = 22 (1)

3x + y = 30 (2)

subtract (1) from (2) to eliminate y

3x - x = 30 - 22

2x = 8

x = 8/2

x = 4

Substitute x = 4 into (1) to solve for y

x + y = 22 (1)

4 + y = 22

y = 22 - 4

y = 18

x = number of packets of strawberry wafers = 4 packets

y = number of packets of chocolate wafers = 18 packets

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2 years ago

It costs $19.50 for postage and $5 for insurance to send a one-pound box by Express Mail.

Nadya [2.5K]

294 dollars

Okay so you would take 19.50 and add the 5 dollar insurance giving you 24.50. Then you’d take the 24.50 and multiply it by 12 giving you 294 dollars

Really hope I got that right

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2 years ago

A health research institute collects information from 20 individuals on the number of years they have spent smoking cigarettes,

olga55 [171]

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The correlation coefficient (r) is calculated as:

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