kyrabright187
kyrabright187 kyrabright187
  • 04-07-2021
  • Mathematics
contestada

help and I'll follow you ​

help and Ill follow you class=

Respuesta :

Samson2007
Samson2007 Samson2007
  • 04-07-2021

Answer:

12 nickels and 9 dimes

Step-by-step explanation:

1/ We have: n + d = 21 <=> d = 21 - n or opposite (n = 21 - d)

2/ We have: 0.05n + 0.10d = 1.50 and then we will put 1/ into 2/

=> 0.05n + 0.10(21 - n) = 1.50

=> 0.05n + 2.1 - 0.1n = 1.5

=> -0.05n = -0.6

=> n = 12

Nevertheless, d = 21 - n = 21 - 12 = 9

Answer Link

Otras preguntas

which of the following is used to caculate the average atomic mass of an element
what is 22.62 rounded to the nearest tenth
Which of the following describes a major cultural difference between the British colonies in New England and in the middle colonies during the 17th and 18th cen
Animals in the same phylum arthropoda must also be in which same taxon
once the alcohol is in the bloodstream it spread through the body
Write an equation that defines the exponential function with base a > 0.
What is 6y-3x=-18 written in slope-intercept form? A.y=-1/2x+3 B.y=1/2x-3 C.y=-2x+3 D.y=2x-3
How did the Supreme Court contribute to the loss of rights held by the Southern blacks?
When molecules are very large or are being moved against their concentration gradient, energy is required to move molecules across a cell membrane. this type of
If canada is north america why aren't candians called american?