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3 years ago

Show that (3+4)2−(3−4)2−(4)(4)=32

Mathematics

1 answer:

tatuchka [14]3 years ago

8 0

Answer:

Explanation below

Step-by-step explanation:

(3+4)= 7

7+2 = 9

-(3-4) (Invisible one)

-3+4 add to the 9

10+2= 12

12-4=8

8×4 =32

Sorry if this seems a bit confusing, but its quite hard to show the process without paper.

Hope this helps! :)

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A = 1/2 h(b^1 + b^2) solve for b^2

finlep [7]

Answer:

$b_{2} = \frac{2A}{h} - b_{1}\\$

Step-by-step explanation:

$A = \frac{1}{2} h(b_{1} +b_{2})\\2A = h(b_{1} +b_{2})\\\frac{2A}{h} = b_{1} +b_{2}\\\frac{2A}{h} - b_{1} = b_{2}\\$

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3 years ago

A convex polygon has Choose...<br> sides when the interior angle sum is 1980º.

Viefleur [7K]

Answer:

13 sides.

Step-by-step explanation:

(n - 2) = 1980 / 180 = 11.

n = 13

When the sum of the interior angles is 1980 degrees, the convex polygon will have 13 sides.

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3 years ago

Worker A earns $7.90 per widget produced, produces 14 widgets per day, and works 10 hours per day. Worker B earns $9.00 per widg

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The answer is D worker A earns more per day but less per hour

7 0

3 years ago

Read 2 more answers

What was Dimitri's mistake? He mixed up the coordinates of the ordered pair when Substituting it into the equations 7x+9y=-4 and

seropon [69]

Answer:

He made a mistake in his calculations when simplifying 5x - 2y

Step-by-step explanation:

Given

The coordinate pair

$(x,y) = (2,-2)$

The equations

$7x + 9y = ?$

$5x - 2y = ?$

Dimitri's Solution

$Equation\ 1: 7x + 9y = -4.$

$7(2) + 9 (-2) = -4.$

$14 + (-18) = -4.$

$-4 = -4.$

$Equation\ 2: 5x -2y = 6.$

$5(2) - 2 (-2) = 6.$

$10 - 4 = 6.$

$6 = 6.$

Required

Identify Dimitri’s mistake

In the first equation, Dimitri made no mistake.

However, he made a mistake when simplifying the second equation.

We have:

$5x - 2y$

and

$(x,y) = (2,-2)$

Substitute $x = 2$ and $y = -2$

So, we have:

$5(2) -2(-2)$

Open bracket

$10 +4$

Finally, we have:

$14$

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3 years ago

96/100 into simplest form

Reptile [31]

96/100 into simplest form is 24/25. I hope this helps.

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3 years ago

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