sarissal sarissal

16-03-2020
Mathematics

contestada

Solve for x.
X 2+ 4x-21 = 0

A.-3,-7
B. -3,7
C.3,-7
D.3,7

Respuesta :

kategins kategins

16-03-2020

answer: C
explanation: when you simplify the quadratic you get (x+7)(x-3), so the roots are -7 and 3

Answer Link

Otras preguntas

In the reaction MgCl2 + 2KOH Mg(OH)2 + 2KCl, how many moles of Mg(OH)2 are produced for every mole of MgCl2?. A. 3. B. 1. C. 2. D. 1/2

Which of the following is an observation and not an inference?. a.. A cup with steam coming from it will be hot to the touch.. b.. Dark clouds in the sky will m

Identify the number that does not belong with the other three. Explain your reasoning. 26.6 repeating 6, square root 48, negative 51 over 2, negative 55.1

Calculate the mass in grams of 0.800 mole of H2CO3.. . 1)49.6. 2)23. 3)78

What characteristic is important for plants found in saltwater wetlands?. a.. tolerance to high temperatures. b.. tolerance to salinity. c.. a range of climate

Hydrogenous sediment is made up of. . . . . A. cinders and rock from undersea volcanoes. . . . B. parts of once-living organisms. . . . C. eroded continent

Jen is starting a nonprofit store. She plans to sell handmade African scarves and jewelry. Which economic question(s) would Jen still need to answer?. . For wh

rewrite 6/4 as a percent. make sure to label your answer with %.

A bookstore rents books to students at $2 per book. The cost per hour of running the bookstore is $300. The numbers of books and the probabilities that the book

As part of a community service project at your high school, you are organizing a fund-raiser at the neighborhood movie theater. Money raised will benefit a summ