3 years ago

What is 20 + 5 + 2 + 3 + 1 minus 1

Mathematics

2 answers:

Serjik [45]3 years ago

8 0

30 :
20+5+2+3+1 = 31
And there’s a minus 1 so it’s 30

Yuri [45]3 years ago

4 0

20 + 5 + 2 + 3 + 1 minus 1 =30

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The base of a triangle is nine centimeters longer than the perpendicular height. If the area of the triangle is 180 square centi

Rom4ik [11]

Answer:

Step-by-step explanation:

<u>Equations</u>

Let's call

b= base of the triangle

h=height of the triangle

The base is 9 cm longer than the height, thus:

b = h + 9

The area of the triangle is:

$\displaystyle A=\frac{bh}{2}$

$\displaystyle A=\frac{(h+9)h}{2}$

And its value is 180:

$\displaystyle \frac{(h+9)h}{2}=180$

Multiplying by 2:

$(h+9)h=360$

Operating:

$h^2+9h-360=0$

Factoring:

$(h-15)(h+24)=0$

The only valid positive solution is:

h = 15 cm

And b = h + 9 = 24

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3 years ago

What is 20 + 5 + 2 + 3 + 1 minus 1 ​

What is 20 + 5 + 2 + 3 + 1 minus 1