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amandapill

amandapill

25.08.2019 •

Mathematics

Lisa's dog has 4 squeaky toys. two thirds of the dog's toys are squeaky toys. how many dog toys does lisa's have in all?

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Ответ:

lauriepdx17

31.12.2021

. Lisa's dog has 4 squeaky toys
. the squeaky toys are 2/3 of all the dog's toys

. let x be number of all dog toys

make an equation
(2/3)x = 4 ← solve
x=6

check
2/3 × 6 = 4

Lisa's Dog has 6 toys in all

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Ответ:

samanthabutryn

25.02.2020

The two zeros of the quadratic function are:

$x=\frac{2}{3},\:x=-\frac{2}{3}$

Step-by-step explanation:

Given the expression

9x^2-4

In order to determine the zeros of the quadratic function, we get the equation

9x^2-4=0

Add 4 to both sides

9x^2-4+4=0+4

Simplify

9x^2=4

Divide both sides by 9

$\frac{9x^2}{9}=\frac{4}{9}$

Simplify

$x^2=\frac{4}{9}$

For x² = f(a) the solutions are: $x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{\frac{4}{9}},\:x=-\sqrt{\frac{4}{9}}$

solving

$x=\sqrt{\frac{4}{9}}$

$=\frac{\sqrt{4}}{\sqrt{9}}$

$=\frac{2}{3}$

also solving

$x=-\sqrt{\frac{4}{9}}$

$=-\frac{\sqrt{4}}{\sqrt{9}}$

$=-\frac{2}{3}$

Therefore, the two zeros of the quadratic function are:

$x=\frac{2}{3},\:x=-\frac{2}{3}$

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