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3 years ago

A rectangle has a width one less than the length. If the perimeter is 30 units find the width and length

Mathematics

1 answer:

Olegator [25]3 years ago

5 0

Answer:

7 units by 8 units

Step-by-step explanation:

ALL POSSIBLE PERIMETERS:

1x14

2x13

3x12

4x11

5x10

6x9

7x8

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Help me lollllllllll!!!!!

Rom4ik [11]

Answer: (3, -4)

Step-by-step explanation:

x = 3

y = -4

7 0

3 years ago

Find the exact solutions of x2 − 3x − 5 = 0 using the quadratic formula. Show all work! 75 points please help!!!!!

noname [10]

Answer:

$x=\dfrac{3+ \sqrt{29}}{2}, \quad \dfrac{3- \sqrt{29}}{2}$

Step-by-step explanation:

Quadratic Formula

$x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\quad\textsf{when }\:ax^2+bx+c=0$

Given quadratic equation:

$x^2-3x-5=0$

Define the variables:

$\implies a=1, \quad b=-3, \quad c=-5$

Substitute the defined variables into the quadratic formula and solve for x:

$\implies x=\dfrac{-(-3) \pm \sqrt{(-3)^2-4(1)(-5)}}{2(1)}$

$\implies x=\dfrac{3 \pm \sqrt{9+20}}{2}$

$\implies x=\dfrac{3 \pm \sqrt{29}}{2}$

Therefore, the exact solutions to the given quadratic equation are:

$x=\dfrac{3+ \sqrt{29}}{2}, \quad \dfrac{3- \sqrt{29}}{2}$

Learn more about the quadratic formula here:

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8 0

2 years ago

Read 2 more answers

What are the x-intercepts of the function f(x) = –2x^2 – 3x + 20?

Jet001 [13]

Answer:

(5/2,0) and(-4,0)

Step-by-step explanation:

I hope this helps.

5 0

3 years ago

A grounds crew is marking out a circular logo at the center of a football field. The logo will

patriot [66]

Answer:

circumference of a circle formula is C=2*pi*r

Step-by-step explanation:

then

141.3 = 2*pi * r

solve for r

141.3/ (2*pi) = r

22.48859 feet

diameter is 2*r

2*22.48859= 44.9771 feet

divide by 3 because there are 3 feet in one yard

44.9771/3= 14.99239 yds.

it doesn't say to round off, but I would call this 15 yds.

Diameter is 15 yards ± .008 yds That's just about 1/4 of an inch

8 0

2 years ago

if the area of polygon P is 20 units² and the ratio of similarity of polygon P to polygon G is 7/3, what is the area of polygon

kipiarov [429]

Hope this helped and I’ve shown my work and the answer! :)

5 0

3 years ago