third option is the correct answer....
Answer:2nd one starting from top left
Step-by-step explanation:
there r two sides congruent and an angle in between
Step-by-step explanation:
<h2>
<em><u>Thank</u></em><em><u> you</u></em></h2><h2>
<em><u>t</u></em><em><u>his </u></em><em><u>is </u></em><em><u>your</u></em><em><u> </u></em><em><u>answer.</u></em></h2><h2>
<em><u>mark </u></em><em><u>Brainlist</u></em><em><u> </u></em><em><u>please</u></em></h2>
Answer: x = 2y
Step-by-step explanation:
Let's solve for x.
2(3x+4y)=4x+12y
Step 1: Add -4x to both sides.
6x+8y+−4x=4x+12y+−4x
2x+8y=12y
Step 2: Add -8y to both sides.
2x+8y+−8y=12y+−8y
2x=4y
Step 3: Divide both sides by 2.
<u>2x
</u>
2
=
<u>4y
</u>
2
x=2y
Answer:
x=2y
---------------------------------------------
Define x and y
---------------------------------------------
Let x be the amount of the cream (which has 2.5% of hydrocortisone)
Let y be the amount of the water-washable base. (which has 0% of hydrocortisone)
---------------------------------------------
Construct the 2 equations:
---------------------------------------------
Both x and y must add up to 120g
⇒ x + y = 120
Both x and y must add up to only 1% of hydrocortisone.
⇒0.025x + 0.0y = 0.01 x 120
⇒0.025x = 1.2
---------------------------------------------
Solve x and y:
---------------------------------------------
x + y = 120 ----------------- (equation 1)
0.025x = 1.2 ----------------- (equation 2)
---------------------------------------------
From equation 2:
---------------------------------------------
0.025x = 1.2
x = 1.2 ÷ 0.025
x = 48
---------------------------------------------
Substitute x = 48 into equation 1:
---------------------------------------------
x + y = 120
48 + y = 120
y = 120 - 48
y = 72
-------------------------------------------------------------------------------------------------------
Answer: 48g of 2.5% of the cream and 72g of the water washable base are needed to make 120g of the prescription.
-------------------------------------------------------------------------------------------------------