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3 years ago

I WILL GIVE BRAINLIEST ANSWER TO THE CORRECT ANSWER!! PLEASE ASAP

Mathematics

1 answer:

Vaselesa [24]3 years ago

3 0

Answer:

1.5

Step-by-step explanation:

the slope is regarded as :

= $\frac{y2-y1}{x2-x1}$

this is also known as the gradient , meaning the differences of two y values divided by the differences of the two corresponding x values

take two values on the slope and put in the form ( x,y)

we shall use two points A and B

A = (80 , 100)

B = (20 , 10)

now use the formula:

$\frac{10-100}{20-80}$

= $\frac{-90}{-60}$

= $\frac{3}{2}$

also can be represented into an integer form

answer is 1.5

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Strike441 [17]

Length = 12 m and width = $\frac{7}{2}$ m.

Solution:

Let the width of the rectangle be w.

Length of the rectangle = 2w + 5

Area of the rectangle given = 42 m²

Area of the rectangle = length × width

length × width = 42

(2w + 5) × w = 42

$2w^2+5w=42$

Subtract 42 from both sides, we get

$2w^2+5w-42=0$

Using quadratic formula,

$$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Here, $a=2, b=5, c=-42$

$$w=\frac{-5 \pm \sqrt{5^{2}-4 \cdot 2(-42)}}{2 \cdot 2}$

$$w=\frac{-5 \pm \sqrt{25+336}}{4}$

$$w=\frac{-5 \pm \sqrt{361}}{4}$

$$w=\frac{-5 \pm19}{4}$

$$w=\frac{-5+19}{4}, w=\frac{-5-19}{4}$

$$w=\frac{14}{4}, w=\frac{-24}{4}$

$$w=\frac{7}{2}, w=-6$

Dimension cannot be in negative, so neglect w = –6.

Width of the rectangle = $\frac{7}{2}$ m

$$L=2(\frac{7}{2} )+5=12 \ m$

Hence length = 12 m and width = $\frac{7}{2}$ m.

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4 years ago