Is number 3 right? And what is number 4??

Mathematics

1 answer:

Anna007 [38]3 years ago

7 0

For number 3 the answer would actually be B, because each day Thomas earns 3 dollars, so on the second day it would be 6 dollars. And for number 4 I think would be C. 7.85 because you would multiply 2.5 by 3.14. Hope this helps :)

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If a boy scout has 3 meters of rope he cuts the rope into 3/5 m long how much rope will he have

bezimeni [28]

1.8 or 1 4/5 hope I help make sure to thank me

7 0

3 years ago

The length of a rectangle is 4 ya more than twice the width x. The area is 510 yd^2. Find the dimensions of the given shape

Furkat [3]

Answer:

The dimensions of the rectangle are

length = 34 yards

width = 15 yards

Step-by-step explanation:

Given:

The shape is of rectangle,

Width of rectangle = x

Area of rectangle = 510 yd²

According to the given condition

Length of rectangle = 4 + 2x

To Find:

length =?

Width = ?

Solution:

We know that,

$\textrm{Area of rectangle} = Length\times Width$

On substituting the given values we get

$510 = (4 + 2x)\times x\\510 = 4x+2x^{2}\ \textrm{using distributive property}\\\textrm{dividing throughout by two}\\255=2x+x^{2} \\\\x^{2} +2x -255 = 0\\$

Which is a quadratic equation so we will apply splitting the middle term that is factorization we get

∴ $x^{2}+ 17x -15x -255=0\\x(x+17)-15(x+17)=0\\(x-15)(x+17)=0\\\therefore x-15 =0\ or\ x+17=0\\\\\textrm{x cannot be negative i.e -17}\\\therefore x=15$