BraedonBourgeois BraedonBourgeois

30-03-2017
Mathematics

contestada

Solve 4r2 – 9 = 91.
A:{±3}
B:{±4}
C:{±5}
D:{±6}

Respuesta :

trinitybrey trinitybrey

30-03-2017

Take the root of both sides and solve. The answer is C.

Answer Link

IsabellaRosette IsabellaRosette

30-03-2017

4r² - 9 = 91
4r² = 91 + 9
4r² = 100
r² = 25
r = + / - 5

Correct option C

Answer Link

Otras preguntas

Government spending and revenue collection used to influence the economy is referred to as _____. the federal budget fiscal year an appropriations bill fiscal p

Given the balanced equation representing a reaction: Fe2O3 + 2Al--> Al2O3 + 2Fe During this reaction, the oxidation number of Fe changes from (1) +2 to 0 as

I need help writing a reflective about elementary school What steps do i take to write a reflective and how long should it be?

Why are scientists concerned about the use of the Bt toxin which is used to kill insects in genetic engineering

what did Lyndon B Johnsons Great Society achieve? it established the medical care for the A) Aged program or Medicare for the Americans age 65 and older B) it p

What is 1e -5e+10e= then +9e

Charles Darwin developed the theory of __________. a. natural selection b. evolution c. nature and nurture d. origins

How did Boris Yeltsin become the first leader of the Russian Federation? a) by leading a coup against Gorbachev’s government b) by inciting a workers’ revolutio

Improvements in _____ are key to achieving a competitive advantage because the firm is then able to improve efficiency and effectiveness. a. feedback b. produ

A square is inscribed in a circle of radius 3 square root 2 find the area