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Llana [10]
2 years ago
9

Cho hình thang cân ABCD (AB//CD) có góc D = 80 độ . Tính góc B ?

Mathematics
1 answer:
Alexandra [31]2 years ago
6 0

Answer:

120 độ

Step-by-step explanation:

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Find the product of 0.34 and 0.02
dmitriy555 [2]

Answer:

<h2>The product is 0.68</h2>

Step-by-step explanation:

A product means we are multiplying. we are multiplying 0.34 and 0.02 which is 0.68

6 0
3 years ago
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X + y = 152,<br><br> 8.5x + 12y = 1,656<br><br> How many hats were sold?
Elodia [21]

Answer:

x = 48 and y = 104

Step-by-step explanation:

Given equations are:

x+y = 152\\8.5x+12y=1656

From equation 1:

x = 152-y

Putting the value of y in equation 2

8.5(152-y)+12y = 1656\\1292-8.5y+12y = 1656\\3.5y+1292 = 1656\\3.5y = 1656-1292\\3.5y = 364\\\frac{3.5y}{3.5} = \frac{364}{3.5}\\y = 104

Now we have to put the value of y in one of the equation to find the value of x

Putting y = 104 in the first equation

x+y = 152\\x+ 104 = 152\\x = 152-104\\x = 48

Hence,

The solution of the system of equations is x = 48 and y = 104

The value of variable which was assumed for number of hats, is the total number of hats.

6 0
3 years ago
1-2 Cos²25°÷(1-2sin²25)<br>​
shusha [124]

Answer:

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Step-by-step explanation:

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2 years ago
Given the function f(x) = log3 (x + 1), determine f^−1(2).
zavuch27 [327]
Given:  <span>f(x) = log3 (x + 1), look for f^-1 (2)

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6 0
3 years ago
Write 4 3/7 as a decimal.
Citrus2011 [14]
Hi!

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3/7 = 0.43

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2. Convert the mixed number 4 3/7 to a fraction. 

4 x 7 = 28
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Now convert that into a decimal.

31/7 = 4.43

The answer is 4.43

Hope this helps! :)
3 0
3 years ago
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