2 years ago

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:

You might be interested in

PLS HELP URGENT!! PLEASEE SIMPLE FRACTIONS question in pic

Blizzard [7]

Answer:

I think it is 13/15 (0,8666666...) but I am not sure

4 0

2 years ago

Read 2 more answers

If x=-4 what is the value of the following expression?

Gre4nikov [31]

Answer:

2x^2 +3x -2

-22

-46

Step-by-step explanation:

6 0

2 years ago

491,852 nearest hundred thousand

r-ruslan [8.4K]

500,000

Rounded to the hundred thousands

6 0

3 years ago

If john makes a contribution to a charity fund at school, the average contribution size will increase by 50% reaching $75 per pe

Sonja [21]

Answer:

$Z= 75*6 -250=200$

So then the correct answer is B. $200.

Step-by-step explanation:

Notation

Let X be the average contribution size before John makes his contribution.

Let Y be the total contribution size before John makes his contribution.

Let Z be John's contribution.

We know that for this case $ 75 represent the original average amount before the contribution with 50% increase so we can set up the following equation in order to find the original average amount

$1.5 X = 75$

And solvong for X we got:

$X = \frac{75}{1.5}= 50$

Now we can find the total contribution before the donation with the following proportion:

$\frac{50}{1}= \frac{Y}{5}$

$Y = 250$

And then with the formula of average taking in count the 6 values we can find the size of donation Z like this:

$\frac{Y+Z}{6}= 75$

$\frac{250+Z}{6}= 75$

$Z= 75*6 -250=200$

So then the correct answer is B. $200.

5 0

3 years ago

What’s the correct answer please help

DENIUS [597]

Answer:

I THINK its 60

Step-by-step explanation:

8 0

2 years ago