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3 years ago

Ruby ate 1/3 (fraction) of a pizza, and Angie ate 1/5 (fraction) of the pizza. How much pizza did they eat in all?

Mathematics

1 answer:

Gnom [1K]3 years ago

3 0

Ruby and Angie ate 8/15 of the pizza all together

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Factor the quadratic equation below to reveal the solutions. X^2+4x-21=-9

a_sh-v [17]

Answer:

x = 3 and x = -7

Step-by-step explanation:

The given quadratic equation is $x^2+4x-21=0$ . We need to find the solution of this equation.

If the equation is in the form of $ax^2+bx+c=0$ , then its solutions are given by :

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

Here, a = 1, b = 4 and c = -21

Plugging all the values in the value of x, such that :

$x=\dfrac{-b+ \sqrt{b^2-4ac} }{2a},\dfrac{-b- \sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-4+ \sqrt{(4)^2-4\times 1\times (-21)} }{2(1)},\dfrac{-4- \sqrt{(4)^2-4\times 1\times (-21)} }{2(1)}\\\\x=3, -7$

So, the solutions of the quadratic equation are 3 and -7.

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3 years ago

Plz help me tyyysmmm

ch4aika [34]

Answer:

$60 \sqrt{2}$

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3 years ago

Is -2x2y3z an expression or equation?

DochEvi [55]

Answer:

expression

Step-by-step explanation:

expressions DON'T have equal signs but equations do.

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3 years ago

what is an equation in the point-slope form of the line that passes through (-3,-1) and has a slope of 2?

LuckyWell [14K]

Answer:

well it would have to be y=2x-3

Step-by-step explanation:

yup

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3 years ago

Rotation 180 about the origin E(2,-2), J(1,2), R(3,3), S(5,2)

hammer [34]

E' (-2, 2) , J'(-1, -2) , R'(-3,-3) , S'(-5, -2)

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3 years ago