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damaskus [11]
3 years ago
8

Using the quadratic formula to solve x2 = 5 – x, what are the values of x? StartFraction negative 1 plus-or-minus StartRoot 21 E

ndRoot Over 2 EndFraction StartFraction negative 1 plus-or-minus StartRoot 19 EndRoot i Over 2 EndFraction StartFraction 5 plus-or-minus StartRoot 21 EndRoot Over 2 EndFraction StartFraction 1 plus-or-minus StartRoot 19 EndRoot i Over 2 EndFraction
Mathematics
2 answers:
nikdorinn [45]3 years ago
4 0

Answer:

Add 4

subtract 24 from 5

2

5 = –6x2 + 24x

5 = –6(x2 – 4x)

(Add 4) inside the parentheses and (subtract 24 from 5).

–19 = –6(x – 2)2

StartFraction 19 Over 6 EndFraction = (x – 2)2

Plus or minus StartRoot StartFraction 19 Over 6 EndFraction EndRoot  = x – 2

The two solutions are (2)Plus or minus StartRoot StartFraction 19 Over 6 EndFraction EndRoot.

Snezhnost [94]3 years ago
3 0

Answer: StartFraction negative 1 plus-or-minus StartRoot 21 EndRoot Over 2

Step-by-step explanation:

The given quadratic equation is expressed as

x² = 5 - x

Rearranging the equation to take the standard form of ax² + bx + c, it becomes

x² + x - 5 = 0

The general formula for solving quadratic equations is expressed as

x = [- b ± √(b² - 4ac)]/2a

From the equation given,

a = 1

b = 1

c = - 5

Therefore,

x = [- 1 ± √(1² - 4 × 1 × - 5)]/2 × 1

x = [- 1 ± √(1 - - 20)]/2

x = [- 1 ± √21]/2

x = (- 1 + √21)/2 or x = (- 1 - √21)/2

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Okie doke. 1cm on the map equals 500 meters. The distance from the gate to the ferris wheel on the map is 2.5cm. To find the actual distance, multiply the length on the map by the distance per centimeter. 500 * 2.5 is 1,250. The actual distance is 1,250 meters.

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7 0
3 years ago
There's a piece of a pyramid is a rectangle with a width of 4.6 cm and the length of the 9 cm. What is the height in centimeters
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Answer:

6cm

Step-by-step explanation:

Given data

Width= 4.6cm

Length= 9cm

Volume= 82.8cm^3

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cross multiply

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8 0
3 years ago
Lily, Louis, and Ben went to an arcade and won tokens for prizes. Louis won 4.5 times as many tokens as Ben. Lily won 8 more tok
lana66690 [7]

<em><u>The expression that describes the number of tickets won by Lily is:</u></em>

a = 8 + 4.5c where "a" is the number of tokens won by Lily and "c" is the number of tokens won by Ben

<em><u>Solution:</u></em>

Given that Lily, Louis, and Ben went to an arcade and won tokens for prizes

Let "a" be the number of tokens won by Lily

Let "b" be the number of tokens won by Louis

Let "c" be the number of tokens won by Ben

<em><u>Given that Louis won 4.5 times as many tokens as Ben</u></em>

So we can frame a equation as:

number of tokens won by Louis =  4.5 times as many tokens as Ben

number of tokens won by Louis  = 4.5 x number of tokens won by Ben

b = 4.5 \times c

b = 4.5c

<em><u>Given that Lily won 8 more tokens than Louis</u></em>

number of tokens won by Lily = 8 + number of tokens won by Louis

a = 8 + b

Substituting the value of b = 4.5c in above expression

a = 8 + 4.5c

Thus the expression that describes how many tokens Lily won is found

7 0
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The answer is 3 because 4x6=24 and add 3 is 27 so she will need 3 dollars.
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