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3 years ago

Helpppppp , quick answer with work pleaseeee

Mathematics

1 answer:

sashaice [31]3 years ago

8 0

Answer:

Step-by-step explanation:

$\sqrt{x-2}+8=x\\\\\sqrt{x-2}=x-8\\$

Square both sides,

$x-2=(x-8)^{2}\\\\x-2=x^{2}-2*x*8+8^{2}\\\\x-2=x^{2}-16x+64\\\\x^{2}-16x+64=x-2\\\\x^{2}-16x+64-x+2=0\\\\x^{2}-17x+66=0$

Sum = - 17

Product = 66

Factors = -6 , -11

x² - 6x -11x + (-6)*(-11) = 0

x(x - 6) -11(x - 6) = 0

(x-6) (x - 11) = 0

x -6 = 0 ; x - 11 = 0

x = 6 ; x =11

Here, x = 6 is a extraneous solution

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Layla wants to build a wooden box with a volume of 454545 cubic centimeters. She started with a width of 3\text{ cm}3 cm3, start

gogolik [260]

The correct question is;

Layla wants to build a wooden box with a volume of 45 cubic centimeters. She started with a width of 3 cm and a height of 3 cm. How long should Layla make the box?

Answer:

Box is 5 cm long.

Step-by-step explanation:

We are given;

Volume; V = 45 cm³

Width; w = 3 cm

Height;h = 3 cm

Now, this box has the shape of a cuboid and the volume of a cuboid is given as;

V = l × w × h

Where;

L is length

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Making L the subject, we have;

V/wh = L

Plugging in the relevant values to obtain;

L = 45/(3 × 3)

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3 0

3 years ago

Ciara buys 7 lb of strawberries for $5.81. How much would she spend if she wanted 15 lb of strawberries?

wlad13 [49]

by multiplication of 15 and 5.81 answer is the

87.15

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3 years ago

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Mr. Anders wants to put a fence around his backyard. His backyard is rectangular. The lengths of the sides are 75 yards , 45 yar

Sati [7]

75 + 45 + 75 + 45 = 240 yards

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3 years ago

What is the variance?

kotegsom [21]

Answer:

Variance is the squared deviation and deviation is the difference of observed value from other values

Step-by-step explanation:

Variance is the squared deviation and deviation is the difference of observed value from other values

$variance=\text({standard deviation})^2$

$Variance=\sum\frac{(x-\mu)^2}{N}$

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3 years ago

What number should be added to the expression x^2+3x+___ in order to create a perfect square trinomial?

kramer

Answer: THIRD OPTION.

Step-by-step explanation:

We need to remember that we can create a perfect square trinomial by squaring a binomial:

$(a\±b)^2=a^2\±2ab+b^2$

Then we need need to pick the coefficient of the x term of the given expression, divide it by 2 and square it:

$(\frac{3}{2})^2=\frac{9}{4}$

Therefore, the number that should be added to the given expression in order to create a perfect square trinomial is:

$\frac{9}{4}$

3 0

3 years ago

Helpppppp , quick answer with work pleaseeee​

Helpppppp , quick answer with work pleaseeee