rosegold3806 rosegold3806

02-11-2017
Mathematics

contestada

A teacher has 100 pencils in a cup. 16 are more sharp than dull. How many are dull and how many are sharp?

Respuesta :

jmja59oyri47 jmja59oyri47

02-11-2017

x = dull pencils
y = sharp pencils
x + y = 100
y = x + 16 ~~Plug this back into your original x+y equation.
x+x+16=100 ==> 2x = 84 ==> x = 42. Plug this back into the y = equation
y = 42 + 16 ==> y = 58.

42 Dull, 58 sharp.

Answer Link

Otras preguntas

How were life forms affected by the rise in atmospheric oxygen levels that began 2.2 billion years ago?

Prove that (x^5)-(x^2)+2x +3=0 has at least one real root. Prove that x=cosx has at least one solution.

How were life forms affected by the rise in atmospheric oxygen levels that began 2.2 billion years ago?

find an equivalent expression without parentheses -(50x-15y+15)=

how is mass transit in cities a possible solution tk urban air pollution?

Which equation has the same y-intercept as y=4x-3?a. y-3=x b. y=8x+3 c. 3-y=4x d. y=-3+8xWhich of the following is the equation of the line

Historians of china have traditionally dated the beginning of Chinese civilization to the founding of the what??

Can someone use the word delta in a sentence

Data are drawn from a symmetric and bell shaped distribution with a mean of 120 and a standard deviation of 5. There are 900 observations in the data set. What

Which equation has the same y-intercept as y=4x-3?a. y-3=x b. y=8x+3 c. 3-y=4x d. y=-3+8xWhich of the following is the equation of the line