A square picture with a side length of 4 inches needs

Mathematics

1 answer:

Vilka [71]3 years ago

5 0

Answer:

x²+8x-65=0

Step-by-step explanation:

The equation to be used is

A=side²

The increased side = X

(4+x)² =81

x² +4x+4x=16=81

x²+8x+16-81=0

x²+8x-65=0

You might be interested in

Which of the following is equal to the sqrt 9*4

olga2289 [7]

$\sqrt{a}=b\iff b^2=a\ for\ a\geq0\ \wedge\ b\geq0\\---------------------\\\\Method\ \#1:\\\\\sqrt{9\cdot4}=\sqrt{36}=6\ because\ 6^2=36\\\\d)\ \sqrt9\cdot\sqrt4=3\cdot2=6\\\\\sqrt9=3\ because\ 3^2=9;\ \sqrt4=2\ because\ 2^2=4\\\\Answer:\ \boxed{d)\ \sqrt9\cdot\sqrt4}\\\\Method\ \#2:\\\\\text{use}\ \sqrt{a\cdot b}=\sqrt{a}\cdot\sqrt{b}\\\\\sqrt{9\cdot4}=\sqrt9\cdot\sqrt4\\\\\text{Therefore your answer is}\ \boxed{d)}$

8 0

4 years ago

Polynomials change of subject formulas

SOVA2 [1]

Example:
To make ‘u’ the subject of the formula in

V = u + at

*subtract ‘at’ to both sides*
V -at = u + at - at

Result:
V - at = u

So the answer would be

u = V - at

8 0

4 years ago

I don't get how to show the work For the Jocelyn estimates on a piece of wood measures 545 cm if it actually measures 5.2 cm wha

olga2289 [7]

Answer:

The percent error is 4.81%.

Step-by-step explanation:

There is a mistake in a question, hence it is corrected below:

Jocelyn estimates on a piece of wood measures 5.45 cm if it actually measures 5.2 cm.

Now, to find the percent error.

Estimation of Jocelyn = 545 cm.

Wood actually measures = 5.2 cm.