3 years ago

8 What value of x makes the equation 5(7x-3) - x=-4x – (-9- 2x) true?

Mathematics

1 answer:

iVinArrow [24]3 years ago

7 0

The value H makes the equation true

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Deceribe one kind of diagram you might draw to help you solve problem?

Gnoma [55]

You could draw out a word diagram

4 0

3 years ago

The length of a rectangle is three more than twice the width. Determine the dimensions that will give a total area of 27m^ {2}.

AveGali [126]

Answer:

3m and 9m

Step-by-step explanation:

length of the rectangle = 2w+3

width of rectangle = w

area = L*W

if area = 27m²

then (2w+3)w=27

=2w²+3w-27=0

using factorization w= 3 or -4.5

w=3m

L=9m

6 0

3 years ago

Read 2 more answers

the length of a rectangle is five feet less than its width. If the area of the rectangle is 84 square feet, find its dimensions

KIM [24]

Let
x---------> the length of the rectangle
y--------> the width of the rectangle

we know that
A=84 ft²
[area of rectangle]=x*y-----> 84=x*y-----> equation 1
x=y-5------> equation 2
substitute 2 in 1
84=[y-5]*y-----> 84=y²-5y---------> y²-5y-84=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
y=12
x=y-5-----> x=12-5-----> x=7

the answer is
the length of the rectangle is 7 ft
the width of the rectangle is 12 ft