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zhenek [66]
3 years ago
7

Find the value for b. 3x^2– X – 10 = 0 Entor the correct answer

Mathematics
2 answers:
ser-zykov [4K]3 years ago
5 0

Answer:

X=2, X= -5/3

Step-by-step explanation:

let's solve your equation step-by-step

3x^2-x-10=0

step 1: factor left side of equation.

(3x+5)(x-2)=0

step 2: set factors equal to 0.

3x+5=0  or x-2=0

x= -5/3 or x=2

Veseljchak [2.6K]3 years ago
4 0

b=-1

.............................

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√160⇒√16⋅10⇒√16⋅√10⇒4√10
7 0
4 years ago
Read 2 more answers
Write an expression to represent the length of each side of the rug.
astra-53 [7]

Answer:

length of side = 10x + 3

Step-by-step explanation:

The area of a square = s² ( s is the length of the side )

given

A = 100x² + 60x + 9 ← perfect square in the form

(a + b)² = a² + 2ab + b²

100x² = (10x)² ⇒ a = 10x

9 = 3² ⇒ b = 3

and 2ab = 2 × 10x × 3 = 60x, hence

100x² + 60x + 9 = (10x + 3)²

s = \sqrt{(10x+3)^2} = 10x + 3 ← length of side

5 0
4 years ago
There are white, blue, and red boats in a marina. Two-thirds of the boats in the marina are white, 4 7 of the remaining boats ar
Aleksandr-060686 [28]

Answer: the number of boats that are in the marina is 105.

Step-by-step explanation:

Let x represent the number of boats that are in the marina.

Two-thirds of the boats in the marina are white. It means that the number of white boats in the marina is

2/3 × x = 2x/3

The remaining number of boats will be

x - 2x/3 = x/3

4/7 of the remaining boats are blue. It means that the number of boats that are blue is

4/7 × x/3 = 4x/21

The number of boats left would be

x/3 - 4x/21 = 3x/21

If there are 15 red boats, it means that

3x/21 = 15

3x = 21 × 15 = 315

x = 315/3

x = 105

3 0
3 years ago
If 3n is an odd number, which of the following is an even number?
Sati [7]

Answer:

Option (a).

Step-by-step explanation:

It is given that 3n is an odd number.

We need to find an even number from the given options.

Even numbers: Which are divisible by 2.

Odd numbers: Which are not divisible by 2.

We need know that the numbers are alternatively even and odd.

If we add or subtract 1 from an odd number, we always get an even number.

If we add or subtract 2 from an odd number, we always get an odd number.

3n is an odd number. So,

3n-1 is an odd number.

3n+2 is an even number.

3n+2 is an even number.

3n+2n is an even number because 2n is an even number and sum of two even numbers in always an even number.

Therefore, the correct option is (a).

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