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Hunter-Best [27]
3 years ago
10

What is the area of the trapezoid?

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
7 0
Area of Trapezoid

A = \dfrac{(B + b)h}{2}

where B = larger base, b = smaller base, and h = height.

For this trapezoid, you have
B = 10 + 7 + 7 = 24
b = 10
h = 9

A = \dfrac{(24 + 10) \times 9}{2}

A = 153
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Daniel says that when the irrational number 7√3 is multiplied by any rational number, the product is always an irrational number
jeka94

Answer: 0

============================================

Explanation:

When we multiply 0 by any number, we get 0 as a result

x*0 = 0

0*x = 0

for any number x.

The number 0 is rational since we can write it as a fraction of two integers

0 = 0/1

If Daniel were to correct his statement to say "multiply by any <u>nonzero</u> rational number", then his statement would be correct that the result is irrational.

----------------------------------------------

Extra info:

Here's a proof showing why Daniel's claim is correct if we consider nonzero rational numbers

Let p be a nonzero rational number, so p = a/b for integers a,b where neither a or b are zero

Let q be an irrational number. We cannot write q as a ratio of two integers

The claim is that p*q is irrational. For now let's assume the opposite. So assume p*q is rational. This means p*q = r/s for integers r,s

This would be the same as (a/b)*q = r/s which solves to q = (r/s)*(b/a) = (rb)/(sa) making q rational, but that contradicts the fact we made q irrational earlier.

Therefore, the assumption p*q is rational cannot be the case, and p*q must be irrational.

7 0
2 years ago
The number of boys exceeded the number of girls by seven. There were 29 boys and girls. How many of each were there?
Elenna [48]

Answer:

Girls: 11

Boys: 18

Step-by-step explanation:

x: number of girls

x+x+7=29

2x=22

x=11

number of guys:

x+7=11+7=18

4 0
2 years ago
Simplify. 3(2x – 2) + 5x
Oliga [24]

Answer:

D

Step-by-step explanation:

3(2x-2)+5x

11x-6

4 0
2 years ago
Read 2 more answers
How would I answer this: How many minutes are in a 30-day month.... use vertical multiplication to get the right answer
cluponka [151]

Answer:

There are 43200 minutes in a 30-day month.

Step-by-step explanation:

We know that:

60 minutes = 1 hour

24 hours = 1 day

Thus to determine the minutes in a 30-day month, let us first determine the number of hours in the month.

   30

x  24

_______

  120

 60

_______

 720 hours

The 30-day month has a total of 720 hours.

So that the number of minutes that make up 720 hours can be determined by;

    720

 x   60

_______

   000

4320

_______

43200

Therefore, there are 43200 minutes in a 30-day month.

3 0
2 years ago
1/2 or (1/2)² which value is greater​
Ket [755]

Answer:

when a expression is squared (²) that means it is multiplyed by itself.

Step-by-step explanation:

(1/2)² = (1/2 x 1/2)

1 squared = 1

2 squared = 4

1/4 is smaller than 1/2. 1/2 is greater than (1/2)²

3 0
2 years ago
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