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3 years ago

Solve for x: 3.2x - 7.4 = -7.8x + 3.6 1. 1 2. 0.8 3 3.8 4. 0.5

Mathematics

1 answer:

Elan Coil [88]3 years ago

6 0

Answer:

The value of x is 1.

Step-by-step explanation:

You have to move all the x-terms to one side and the unrelated values to other side :

$3.2x - 7.4 = - 7.8x + 3.6$

$3.2x + 7.8x = 3.6 + 7.4$

Next, you have to add up :

$11x = 11$

Lastly, you have to divide it by 11 :

$x = 11 \div 11$

$x = 1$

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E=mc^2 in terms of m

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3 years ago

The function f(x) = –x2 + 20x – 75 models the profit from one customer, in dollars, a shop makes for printing photos, where x is

trasher [3.6K]

The function is graphed as shown below

Part A:

We use the formula $- \frac{b}{2a}$ to find the vertex of the function. A quadratic function of the form of $a x^{2} +bx+c$ and equating this form to the given function $- x^{2} +20x-75$ , we have
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Substituting $a$ and $b$ into the vertex formula, we have
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This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos

Part B:

We can find solution to this equation by factorising

$- x^{2} +20x-75=0$
$-( x^{2} -20x+75)=0$
$x^{2} -20x+75=0$
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$x=5$ and $x=15$ , as shown in the graph

The two values means that the company makes no profit when they either produce 5 or 15 photos

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3 years ago

All of the following represent the same function except ____.

Whitepunk [10]

Answer:

I believe it's C

Step-by-step explanation:

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3 years ago

Read 2 more answers

Hi please help me answer this!!

just olya [345]

The numbers that are irrational are B. √72 and D.√23.

<h3>What are irrational numbers?</h3>

Irrational numbers are those that have infinite numbers after the decimal. These numbers are also none repeating.

When the above are solved:

√25 = 5

√144 = 12

√23 = 4.79583152331...

√72 = 8.48528137424...

The only two numbers with non-repeating and infinite numbers are √72 and √23.

Find out more on irrational numbers at brainly.com/question/20400557

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1 year ago

Change 5.5 into centimetres

jolli1 [7]

5.5 inches? If so 13.97 cm.

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3 years ago