jay47374 jay47374

04-06-2019
Mathematics

contestada

Solve by extracting roots. Round your answers to two decimal places.

5a² - 85 = 2.2a² - 30

a =

Respuesta :

KAGSCoco KAGSCoco

04-06-2019

2.8a^2=55
a^2=55/2.8
a= square root of 55/2.8

Answer Link

Shin2112 Shin2112

04-06-2019

Answer:

a = 2.62 or - 2.62 (2 d.p.)

Step-by-step explanation:

5a² - 2.2 a² = 85 - 30

2.8 a² = 55

a² = 55/2.8

a = +- sqroot(55/8)

a= 2.6220221204 or - 2.6220221204

a = 2.62 or - 2.62 (2 d.p.)

Answer Link

Otras preguntas

Which statement explains how you could use coordinate geometry to prove that quadrilateral ABCD is a rectangle? a coordinate plane with quadrilateral ABCD at A

How was the U.S. involvement in these Cold War conflicts different than full scale invasions in wars like WWII?

Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s). The equation for the reaction is 2KClO3⟶2KCl+3O2 Calcula

246,000 in scientific notation

why was the United States involved in Iraq after 9/11

Which excerpt from "A Poem for My Librarian, Mrs. Long" gives the best example of an impliclt detail?

In which situations is eleastic potential energy present check all that apply

Use the figure at the right. If JK = 3x + 4 and NO = 11, what is the value of x?

What can JavaScript be used for if I want to hack something I learned JavaScript but don’t know what to hack with it

A teacher surveyed her class after they had taken a vocabulary test. Eighteen of the students claimed they had studied at least one hour for the test. The remai