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4 years ago

Consider the quadratic equation y^2-y=6. what is the error with the solution below?

Mathematics

1 answer:

erica [24]4 years ago

5 0

Answer:

y=-2 or y=3

Step-by-step explanation:

Y^2-y-6=0

y^2-3y+2y-6=0

y(y-3)+2(y-3)=0

(y+2)(y-3)=0

y=-2 or y=3

hope it helps

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In geometry, Heron's formula (sometimes called Hero's formula), named after Hero of Alexandria, gives the area of a triangle by

uysha [10]

Answer:

C) $6.495\: ft^2$

Step-by-step explanation:

a = 7 ft, b = 3 ft, c = 5 ft (Given)

Therefore, a + b + c = 7 + 3 + 5 = 15 ft

Let's calculate semi Perimeter of the triangle which is given by s

$s =\frac{a+b+c}{2}=\frac{15}{2} = 7.5 \: ft$

Now, by Heron's formula, area of triangle ABC is given as:

$A(\triangle ABC) =\sqrt{s(s-a) (s-b)(s-c)}$

$\therefore A(\triangle ABC) =\sqrt{7.5(7.5-7) (7.5-3)(7.5-5)}$

$\therefore A(\triangle ABC) =\sqrt{7.5(0.5) (4.5)(2.5)}$

$\therefore A(\triangle ABC) =\sqrt{42.1875}$

$\therefore A(\triangle ABC) =6.49519053$

$\therefore A(\triangle ABC) =6.495\: ft^2$

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3 years ago

Micah and his brother found some cash at a bus stop.They split the money evenly, each getting $ 16. How much money did they find

Lisa [10]

Answer: 32 dollars

Step-by-step explanation:

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4 years ago

Ashad is rewriting the expression 28 a + 36 a b as a product. Which statements about the expression are accurate and relevant to

Gala2k [10]

Answer:

(B)The GCF of the numbers(28 and 36) in each term in the expression is 4.

(C)The GCF of the variables(a and ab) in each term in the expression is a.

(E)The factored form of the expression is 4a(7+9b)

Step-by-step explanation:

Given the expression: $28a+36ab$

If we write it as a product, we obtain:

$28a+36ab=4a(7+9b)$

We can see the following

The GCF of the numbers(28 and 36) in each term in the expression is 4.
The GCF of the variables(a and ab) in each term in the expression is a.
The factored form of the expression is 4a(7+9b)

The correct options are B, C, and E.

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4 years ago

The edge of each cube used to build this rectangular prism is 14 centimeter long. Which equation shows the volume of the prism,

Lunna [17]

Its 4/4 x 3/4 x 3/4 cm3 =9/16 cm3

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4 years ago

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Find the area of a circle with a diameter of \color{green}{4}4start color green, 4, end color green. Either enter an exact answe

borishaifa [10]

Answer:

Step-by-step explanation:

In which equation do we multiply \blueD{x}xstart color #11accd, x, end color #11accd by \greenD{5}5start color #1fab54, 5, end color #1fab54 to get \maroonD{y}ystart color #ca337c, y, end color #ca337c?

Hint #22 / 2

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3 years ago

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