Answer: ruler cost $12
Step-by-step explanation:
step 1
Let cost of ruler be represented as r
and cost of pencil be represented as p
we were given that
4 rulers and a pencil and these cost the same as 2 rulers and 4 pencils which is expressed as
4r + p = 2r+ 4p
and cost of pencil= $8
therefore
sTEP 2--- Solving
4r+ 8 = 2r+ 4 x8
4r+ 8 = 2r+ 32
4r - 2r= 32-8
2r= 24
r= 24/2 = r= $12
10 1/3= 31/3
12=36/3
31/3 × 36/3=124
I hope this helped!!!:)
Hello
y²+y-6=0
==> y²-2y+3y-6=0
==>y(y-2)+3(y-2)=0
==>y-2)(y+3)=0
==>y=-3 or y=2
Answer C (-3,2)
Answer:
-15
Step-by-step explanation:
x=5
<h3><u>Answer:- </u></h3>
<h3><u>Solution</u> :-</h3>
The unit of mass is kg and unit of Volume is m³ . Since density is division of mass by volume , the corresponding units will also get divided and unit of density would come out to be kg/m³
<u>Some basic </u><u>derived </u><u>Units :- </u>
- area => m²
- volume cubic meter => m3
- speed meter per second => m/s
- acceleration => m/s²
- mass density meter => kg/m3
- specific volume cubic meter per kilogram m³/kg
