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4 years ago

Solve for x. Use the completing the squares

1 answer:

4 0

Hello there!
Move all terms to the left side and set equal to zero. Then set each factor equal to zero.
$x=-4± \sqrt{7}$
$x≈-1.35424868, -6.64575131$

Hope this helps! :)
~Zain

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After five games a football team's goal average is 2.8. After one more game the goal average is 3. The number of goals scored in

Svetlanka [38]

Answer:

4 goals

Step-by-step explanation:

Let:

x = number of total goals scored in first 5 games

y = answer = number of goals in 6th game

formula:

average = sum of individual parts / total number of parts

average_5_games = x / 5 = 2.8

solve for x:

x = 2.8 × 5 = 14

average_6_games = (x + y) / 6 = 3

solve for y:

x + y = 6 × 3 = 18

y = 18 - x = 18 - 14 = 4

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3 years ago

Read 2 more answers

Tìm x : 2x^2-7x+3=0<br> giúp tui zới, please

Gnoma [55]

<h2>Solving Quadratic Equations with the Quadratic Formula</h2>

<h3>Answer:</h3>

$x = 3$ and $x = \frac{1}{2}\\$

<h3>Step-by-step Explanation: </h3>

Recall:

if we have a quadratic equation, $ax^2 +bx +c = 0$ , where $a$ , $b$ and $c$ are real numbers and $a \neq 0$ , $x = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}$ .

Given:

$2x^2 -7x +3 = 0$

Solving for $x$ :

$x = \frac{-(-7) \pm \sqrt{(-7)^2 -4(2)(3)}}{2(2)} \\ x = \frac{-(-7) \pm \sqrt{49 -4(2)(3)}}{2(2)} \\ x = \frac{7 \pm \sqrt{49 -24}}{4} \\ x = \frac{7 \pm \sqrt{25}}{4} \\ x = \frac{7 \pm 5}{4}$

Solving with the positive value:

$x = \frac{7 +5}{4} \\ x = \frac{12}{4} \\ x = 3$

Solving with the negative value:

$x = \frac{7 -5}{4} \\ x = \frac{2}{4} \\ x = \frac{1}{2}$

7 0

3 years ago

An aquarium measures 61 cm long, 30.5 cm wide, and 30.5 cm high.If the tank is only filled to 80% capacity with water, how much

LiRa [457]

Answer:

$V=45396.2\ cm^3$

Step-by-step explanation:

Given that,

The dimensions of an aquarium are 61 cm long, 30.5 cm wide, and 30.5 cm high.

The tank is filled to 80% capacity with water.

We need to find the water needed for this tank.

The volume of cuboid is given by :

$V=lbh$

As it is filled to 80% capacity, so,

$V=\dfrac{80}{100}\times lbh\\\\=0.8\times 61\times 30.5\times 30.5\\\\V=45396.2\ cm^3$

So, $45396.2\ cm^3$ of water is needed for this tank.

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3 years ago

7men have 7wives, each man and each wife have 7children what is total number of people

UkoKoshka [18]

Answer:

Step-by-step explanation:

If 7 men have 7 wives, that means they have 1 wife each, so that will be 7+7=14. Then each wife has 7 children, so that will be 7×7=49, next we add the children to the men and the wives and get 49+14=63. So the total number of people is 63.

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2 years ago

What does it mean if the probability is 0% that a blue marble will be drawn form a bag? A. The number of blue marbles in the bag

Nat2105 [25]

The answer is C, because if it says thatit has 0%,it means that there is no chance of getting blue

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4 years ago