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2 years ago

Can someone please help me

Mathematics

2 answers:

Ymorist [56]2 years ago

7 0

Answer:

The mode is 31

good luck naka

marta [7]2 years ago

3 0

The mode is 31 good luck hahahah

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Select and use the most direct method to solve 2x(x + 1.5) = -1. Describe and justify the methods you used to solve the quadrati

miskamm [114]

Step-by-step explanation:

Given that,

A quadratic equation,

2x(x + 1.5) = -1

We need to solve the quadratic equation. Firstly we need to simplify the above equation to form it as $ax^2+bx+c=0$ .

So,

$2x^2+3x=-1\\\\2x^2+3x+1=0$

Here, a = 2, b = 3 and c = 1

The roots of the given equation can be given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Putting all the values we get :

$x=\dfrac{-b\pm \sqrt{b^2+4ac} }{2a}, \dfrac{-b\pm \sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-3\pm \sqrt{3^2+4(2)(1)} }{2(2)}, \dfrac{-3\pm \sqrt{3^2-4(2)(1)} }{2(2)}\\\\x=\dfrac{-3+1}{4}, \dfrac{-3-1}{4}\\\\x=-\dfrac{1}{2}, -1$

So, the roots of the given equation is -1/2 and -1.

5 0

3 years ago

Find the area of a regular polygon with 100 sides with a perimeter of 100 units

Gnom [1K]

<span>The area of any regular polygon with n sides of length s is

s = 100/100 = 1

Area =~ 795.55 sq units</span>

4 0

3 years ago

A probability that is computed with the knowledge of additional information is

lianna [129]

Answer: called conditional probability

6 0

3 years ago

Read 2 more answers

Simplify the expression -3z(1.8z-2.2).

alexdok [17]

Answer:

$- 5.4z {}^{2} + 6.6z$

Step-by-step explanation:

Given:

$-3z(1.8z-2.2)$

Solution:

Applying Distributive property,we obtain

$(−3z)(1.8z)+(−3z)(−2.2)$

Simplifying using PEMDAS:

$- 5.4z {}^{2} + 6.6z$

Done!

5 0

2 years ago

Plz help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

iren2701 [21]

Answer:

88 inches

Step-by-step explanation:

The given bicycle has a tyre that is 28 inches in diameter.

How far the bicycle moves forward each time the wheel goes around is the circumference of the bicycle tyre.

This is calculated using the formula:

C =\pi \: d

We substitute the diameter and

\pi = \frac{22}{7}

C = \frac{22}{7} \times 28

This simplifies to

C =22 \times 4

88 \: inches

7 0

3 years ago