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2 years ago

Helpppppppppppppppppp

Mathematics

1 answer:

Sever21 [200]2 years ago

8 0

Answer:

-1

Step-by-step explanation:

Square both sides of the equation. (That is what is meant by "use the inverse relationship.")

$i^2=(\sqrt{-1})^2\\i^2=\boxed{-1} \qquad\text{simplify}$

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Using the quadratic formula, what is the solution to 2x^2-5x-6=0 ?

Alex17521 [72]

$\bf \textit{quadratic formula}\\

\begin{array}{lcclll}
2x^2&-5x&-6&=0\\
\uparrow &\uparrow &\uparrow \\
a&b&c
\end{array}
\qquad \qquad 
x= \cfrac{ - {{ b}} \pm \sqrt { {{ b}}^2 -4{{ a}}{{ c}}}}{2{{ a}}}\\\\
-----------------------------\\\\
x=\cfrac{-(-5)\pm\sqrt{(-5)^2-4(2)(-6)}}{2(2)}\implies x=\cfrac{5\pm\sqrt{25+48}}{4}
\\\\\\
x=\cfrac{5\pm\sqrt{73}}{4}\implies x=
\begin{cases}
\cfrac{5+\sqrt{73}}{4}\\\\
\cfrac{5-\sqrt{73}}{4}
\end{cases}$

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3 years ago

What mesurment would you use to find the volume of a cup

Bas_tet [7]

The measurment you would use to find volume of a cup is the metric system

3 0

2 years ago

Tiffany made 40 cupcakes for her birthday. She gave 5 to her family before taking the rest to school. What percent did she give

kati45 [8]

40
40 - 5
40 +40 +20= 100%
5+5+2.5= 12.5 %
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7 0

2 years ago

Which expression represents rational numbers? Select all that apply

ohaa [14]

Answer:

So options 1,2,3,6 are rational numbers.

Step-by-step explanation:

1). In this option the given number is √100×√100 =10×10=100

Which is a rational number.

2) 13.5+√81 = 13.5 + 9 = $\frac{27}{2}+9$

Its a rational number

3) √9+√729 =3+ 27 =30

It is a whole number which is the form of rational number.

4) √64+√353 = 8 + 18.788924( an irrational Number) =26.79

So addition of any number to an irrational number is always irrational number.

5) $\frac{1}{3} +\sqrt{216}$ = 1/3 + 14.6969( an irrational number)

When we add any number to an irrational number it's sum is always irrational number.

6) $\frac{3}{5} +2.5$

Again addition of two rational number giving a fraction.So it is a rational number

So options 1,2,3,6 are rational numbers.

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2 years ago

Read 2 more answers

Unit Cost for 500

Liula [17]

Answer : The 12- oz box of Honeycomb cereal for $4.32 is a better buy.

Explanation:

A 12- oz box of Honeycomb cereal for $4.32 has a unit cost of $0.36. A 16-oz box of Cheerios for $5.92 has a unit cost of $0.37. Therefore the 12-oz box of honeycomb cereal is a better buy.

6 0

3 years ago