There's 2 easy ways to do it (more than 2, but I find these easy):
First of all, divide the price by 100 to find what 1% is.
Now, you can either multiply by thirty to find how big the discount is and take that away OR you can multiply by 70, seeing as 70% is left once the 30% discount is in effect.
Answer:
30 ml of 45% salt solution and 20 ml of 30% salt solution.
Step-by-step explanation:
Let x be the amount of 45% salt solution and y be the amount of 30% salt solution
the two equation will be:
x+y=60 -- A
0.45x+0.3y=0.4(60) -- B
Solve by substitution
Rewrite Equation A
x+y=60
x=60-y --- C
Substitute C into B
0.45(60-y)+0.3y=24
27-0.45y+0.3y=24
-0.15y=-3
y=20
<u>Substitute</u> the y=20 into equation C
x=60-20
x=30
Therefore, there was 30 ml of 45% salt solution and 20 ml of 30% salt solution.
Answer:
37.8 metre
Step-by-step explanation:
CHECK THE COMPLETE QUESTION BELOW;
Linda shoots an arrow at a target in an archery competition. The arc of the arrow can be modeled by the equation y= -0.02x to the power of 2 + 0.65+4 where x is the horizontal distance (in meters) from Linda and y is the height (in meters) of the arrow. How far from Linda does the arrow hit the ground? Round to the nearest tenth.
From the question, we are told that the equation that modelled the arc is
y=-0.02x²+0.65x+4
From the question, "x" in the equation=
the horizontal distance (in meters
While "y" in the equation = the height (in meters) of the arrow.
We can find the value of x and y by equating to zero(since arrow hits the ground when its height (y) is zero) then solve the quadratic equation using quadratic formula
y=-0.02x²+0.65x+4=0
We have, x=37.79 or -5.29
The negative x= -5.29 can be described as been at the back of Linda,
But the distance is of positive value, therefore, the arrow hit the ground at 37.8 metre from Linda after Rounded to the nearest tenth.
The answer is 5.9999 or 6 please give brainliest answer
Answer:
175, 176, 177
Step-by-step explanation:
the first number is 175, so the second number is 175 + 1 and the third number would be 175 + 2. And they add up to 528.