Seudónimo Seudónimo

12-12-2016
Mathematics

contestada

Twice the sum of a number and 9 equals 7.
Use the variable y for the unknown number.

Respuesta :

12-12-2016

2(y + 9) = 7 Since it says twice the SUM, you have to do the addition first so the 2 times goes outside the parenthesis.

2y + 18 = 7 Subtract 18 from both sides
2y = -11 Divide both sides by 2
y = -11/2

Answer Link

Otras preguntas

Sam draws two polygons that are similar. The first polygon has a perimeter of 16 cm and the second polygon has a perimeter of 10 cm. If the shortest side of

Is catalyst a reactant? Why or why not?

an electric heater of power 1000W has a resistance of 10 ohm. calculate the magnitude of current

Can producers function without sunlight?

chip earns a base salary of $500 per month as a salesman.in addition to the salery, he earns $90per product that he sells. if his goal is to $5000 per month, ho

name as many punctuation marks as possible!!

Where are monsoons are most commonly found?

Most nuclei contain a _______________ where ribosomes are made and partially assembled. The _______________ is fluid inside the cell membrane that surrounds th

how much topsoil would i need for a space 24'x24'x4"deep

Camille placed blocks on a table in rows and columns. All the rows and columns had the same number of blocks in them and formed a square. Which could be the tot