1 year ago

100 POINTS

Mathematics

2 answers:

ddd [48]1 year ago

8 0

B: nine and one over two ft

Oksana_A [137]1 year ago

8 0

Answer:

The answer is B, 9 1/2

Step-by-step explanation:

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Find the estimates of x^2-x-2=3

Julli [10]

Answer:

$x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

Step-by-step explanation:

Given

Quadratic equation is

$x^2-x-2=3\\x^2-x-5=0$

Roots of the quadratic equation $ax^2+bx+c=0$ are

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

So, for the given equation roots are

$x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79$

5 0

3 years ago

The height of a parallelogram is 4.5 CM the base is twice the height what is the area

stepan [7]

Answer:

121.5

Step-by-step explanation:

Area is bases times height. The height is 4.5. And the bases is double the height. So 4.5 times 2 is 27. so we back to area wich is now 4.5 times 27 which is 121.5

<h2>A = b times h </h2><h2 /><h2>h times 2 = b </h2><h2 />

3 0

3 years ago

Factor out the gcf -15y - 25<br>help me plzzzz

denpristay [2]

Answer: -5(3y+5)

Step-by-step explanation:

5 0

3 years ago

What is the perimeter of a square window with sides 36 inches long?

Ierofanga [76]

PERIMETER IS 144 36X4=144