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Elena-2011 [213]
2 years ago
12

Diện tích xung quanh của hình chóp tứ giác đều có cạnh bằng 6cm và độ dài trung đoạn bằng 10cm là:

Mathematics
1 answer:
Serggg [28]2 years ago
5 0

Answer:

A

Step-by-step explanation:

(6.2).10=120cm²

Đáp án đó chúc bạn học tốt

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Find two numbers such that the sum of the first and three times the second is 5 and the sum of the second and two times the firs
Sav [38]

Answer:

first number= 19/5

second number= 2/5

Step-by-step explanation:

first number= a

second number= b

a+3b=5   equation 1

b+2a=8  equation 2

using equation 2 we have

b=8-2a

using equation 1 we have

a+3(8-2a)=5  

a+24-6a=5

24-5=6a-a

19=5a

a=19/5 = first number

so using b=8-2a

we have

b=8-2(19/5)

b=8-(38/5)

b=2/5 = second number

4 0
3 years ago
Help!!!! I don't get this!!!!!!
lara31 [8.8K]

Answer:

C

Step-by-step explanation:

One pound (lb) is equal to 16 (oz). So, if you are trying to find how many ounces are in one pound, you have to divide the number of pounds by the 16,   the amount of ounces in one pound.

6 0
3 years ago
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Find x. <br><br> _______________
devlian [24]

Answer:

16

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask

7 0
3 years ago
Solve (-6 - 4)÷(-5) =
Vinil7 [7]

-6-4=-10

-10/-5=2

so 2 is ur answer

4 0
2 years ago
Are 9x and 9x2 like terms? Explain why or why not?
enot [183]

Answer:

no

Step-by-step explanation:

they are not like terms because the term 9x^2 is to the 2nd power which means that you are supposed to times the number by itself 2 times and 9x is not to the 2nd power so it stays the same.

4 0
3 years ago
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