Answer:
4
Step-by-step explanation:
Let the required number be x.
Since, Five times the sum of a number and 3 is 35.
Answer:
x=5
Step-by-step explanation:
Set the 2 equations equal to each other and solve for x.
11x-28=7x-8
add 28 to both sides (-8+28=20)
11x=7x+20
subtract 7x from both sides (11x-7x=4x)
4x=20
divide both sides by 4 to isolate x (20/4=5)
x=5
<span>a, để pt có nghiệm thì denta ≥ 0 <=> (3-m)^2 - 4( 3-2m) ≥ 0 <=> m^2 +2m-3 ≥ 0 ( ^ là mũ)
giải bpt mới tìm được đó ta đc : m ≤ -3 hoặc m ≥ 1
b, * Xét m-1=0 <=> m=1 => thay m=1 vào pt thì pt có 1 nghiệm là 1/8 (1)
* Xét m-1 ≠ 0 <=> m ≠ 1
=> pt có nghiệm khi denta' ≥ <=> (m+3)^2 - (m-1)(-m+2) ≥0 <=> 2m^2 +3m+11 ≥ 0 (*)
-> bpt (*) có denta < 0 nên nó luôn đúng với mọi m ≠1 -> denta của pt đã cho luôn > 0 với mọi m ≠ 1 (2)
từ (1) (2) => với mọi m pt luôn có nghiệm </span>
The area of the green region is of:
9 units².
<h3>How to obtain the area of the green region?</h3>
The base is composed by three equal segments, hence their lengths are given as follows:
AB = BC = CD = 9/3 = 3.
The heights are given as follows:
As they are proportional.
The green region is composed by:
- A rectangle of dimensions 3 and 2.
- A right triangle of sides 3 and 2.
The area of the rectangle is given by the multiplication of the dimensions, hence:
Ar = 3 x 2 = 6 units².
The area of the triangle is given by half the multiplication of the dimensions, hence:
At = 0.5 x 3 x 2 = 3 units².
Then the area of the green region is given by:
A = Ar + At = 6 + 3 = 9 units².
More can be learned about the area of a figure at brainly.com/question/25292087
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Answer:
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Step-by-step explanation:
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