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pav-90 [236]
3 years ago
5

Need help with these math questions

Mathematics
1 answer:
PolarNik [594]3 years ago
5 0

Answer:

31200 m

Step-by-step explanation:

120 times 60 equals 7200  and 200 times 120 equals 24000 and add the two up you get 31200

You might be interested in
Katalina is solving algebraic expressions for her math homework. She solves the problem 7y -12, when y = 3. Katalina says that t
Tomtit [17]

Answer:

No

Step-by-step explanation:

Substitute 3 in for y

7y-12

7(3)-12

21-12

9

She is not correct, the correct answer would be 9

7 0
3 years ago
A family plans to have the hardwood floors in their square dining room re-finished, and new baseboards installed. The cost of re
Alexus [3.1K]

Answer:

Dimension of room = 18 foot x 18 foot

Step-by-step explanation:

Let the square room is of side a foot,

The cost of re-finishing the hardwood floors is $2.25 per square foot and the cost of purchasing and installing the new baseboards $14.5 per linear foot

Total cost is  $1773.

Cost for re-finishing the hardwood floors = Area x 2.25

Area = a²

Cost for re-finishing the hardwood floors = 2.25 a²

Cost of purchasing and installing the new baseboards = Perimeter x 14.5

Perimeter = 4a

Cost of purchasing and installing the new baseboards = 4a x 14.5 = 58 a

Total cost = Cost for re-finishing the hardwood floors + Cost of purchasing and installing the new baseboards

1773 = 2.25 a² + 58a

2.25 a² + 58a - 1773 = 0

a = 18 or a = -43.77(not possible)

Dimension of room = 18 foot x 18 foot

7 0
3 years ago
Please help, and show work thank you :)
frosja888 [35]

Having a $75 added cost to the total price, we can presume they will never equal. It is easy to see if you make it algebraic:

m=months\\t=total\\\\ProviderA => t = 39.95m\\ProviderB => t = 39.95m+75

They will never equal each other.

3 0
3 years ago
một hộp đựng 11 tấm thẻ được đánh số từ 1 đến 11. tính số cách lấy ra 4 tấm thẻ từ hộp đó để tổng các số ghi trên 4 tấm thẻ ấy l
Whitepunk [10]

Answer:

16/33

Step-by-step explanation:

Tổng của cả 4 tấm thẻ là một số lẻ khi:

Có 1 thẻ là lẻ, 3 thẻ còn lại là chẵn, có: 6C1.5C3=60 cách

Có 3 thẻ là lẻ, 1 thẻ là chẵn, có: 5C1.6C3=100 cách

Suy ra có 160/11C4=16/33 cách

3 0
3 years ago
Copy the problems onto your paper, mark the given and prove the statements asked. Given: marked Prove: ΔABC ≅ ΔDBC, ΔEHF ≅ ΔGHF
hjlf

The proof is given below. Please go through it.

Step-by-step explanation:

To solve Δ ABC ≅ Δ DBC

From Δ ABC and Δ DBC

AB = BD (given)

AC = CD (given)

BC is common side

By SSS condition Δ ABC ≅ Δ DBC ( proved)

To solve Δ EHF ≅ Δ GHF

Δ EHF and Δ GHF

EH = HG ( given)

∠ EFH = ∠ GFH ( each angle is 90°)

HF is common side

By RHS condition

Δ EHF ≅ Δ GHF

7 0
3 years ago
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