Answer:
First we add 7 on both sides
-7x+3y= -6.3
+7. +7
___________
then we simply
-7x + 7x= -1
bring down the 3y
-6.3+ 7x = 0.23
So, -1x+3y=0.7
2y = 0.7
___ __
2. 2
y = 0.35 or 35!!
Step-by-step explanation:
Hope this helps
20% decrease will be 20/100 ×30 dollars = 6 dollars
Answer:
A.
Step-by-step explanation:
correct answer is
if to compare the values of the y, (0;100), (1;91), (2;82.81), (3; 75.3571), then
75.3571/82.81=82.81/91=91/100=0.91, it means the next value is decreased at 9%.
Let:
Vbu= Volume of the buret
Vbk= Volume of the beaker
A buret initially contains 70.00 millimeters of a solution and a beaker initially contains 20.00 ml of the solution the buret drips solution into the Beaker. each drip contains 0.05 mL of solution, therefore:
x = Number of drips
a = volume of each drip
after how many drips will the volume of the solution in the buret and beaker be equal ? Vbu = Vbk:
Answer:
Base at the top should be the same length, thus 20ft.
right triangle thus 90 degrees angle.
180 - 90 - 40 = 50
20ft/sin50 = Height/sin40
Height of the traffic light = 16.78
16.78 + the height of Andrew eyes ( 5ft) = 21.78