15-12-2017
Mathematics

contestada

The sum of 21 and a number is 30

Respuesta :

VivaciousLyla VivaciousLyla

15-12-2017

Hi!

Use the opposite operation to solve: (Subtraction)

30 - 21 = 9

So, the sum of 21 and 9 is 30.

Answer Link

Otras preguntas

Look at the simultaneous equations below. x 6y=10 - 3y² = 4x + 1 a) Show that 3y² - 24y - 41 = 0 b) Use part a) to solve the simultaneous equations. If any of y

XYZ company has ended the year with a receivable balance of $300 for items sold on 31st December 20xx. It forecasted the sales to reach $350 in Q1 and $500 in Q

Simplify the expression. 3.8−4.9n−3n+6

If the shape of the population from which a simple random sample is drawn is normal, then the shape of the sampling distribution of X-bar is called

ind pH in the following solution if their [H^+] concentration is : a) [5x10^-9 ml/dm^3]

Lincoln makes beaded necklaces. Each necklace has three sections. The first section is made 3 1 from-inch beads, the second section is made from-Inch beads, and

39/22 * 3/13 of 116 over 36 x 60 number 6/12 x + 11 whole number 3/4

11.- ¿Cómo se llamó al tipo de caza en la que se capturaban conejos y aves? a) De roedores. c) Caza veloz. b) Caza menor. d) Cacería intrépida. Aiudaaaaa

AP bio chapter 7 evolution. A population of organisms will not evolve if….? Following answer to the question (Only one answer is correct) 1:All individual var

Find two monomials whose product equals -20a^4b², and whose sum is a monomial with a coefficient of 1.