Hi there!
To start off, you should not use this equation because it is incorrect to use for this problem.
Here's how you should solve it:
The base angles of an isosceles triangle is always equal. That means angle S also has a measure of 2x+2.
Now, add up all the angles.
(2x + 2) + (2x + 2) + (3x + 1) = 180
This is the proper equation. Now, open the parenthesis and combine like terms.
7x + 5 = 180
Now, subtract both sides by 5
7x = 175
Now, divide both sides by 7.
x = 25
To solve for angle R, plug in x=25 into 3x+1
3(25) + 1
= 76
The measure of angle R is 76 degrees.
Have an awesome day! :)
1: 9
2:7
3:625
Hope it helps!!!!!!!!!!!!
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Answer:
2.25
Step-by-step explanation:
The answer would be 2.25 gallons
Answer:
It should be the last one, She made a sign error when multiplying.
Answer:
Jack is 6 and Mom is 30
Step-by-step explanation:
J = Jacks age
M = Mom's age
5J = M
In 6 years, so add 6 to the age
3(J+6) = (M+6)
We have a system of 2 equations and 2 unknowns
Lets simplify the 2nd equation
3(J+6) = (M+6)
3J + 18 = M+6
Substituting M =5J
3J + 18 = 5J +6
Subtract 3J from each side
3J-3J + 18 = 5J-3J +6
18 = 2J+6
Subtract 6 from each side
18-6 = 2J+6-6
12 = 2J
Divide each side by 2
12/2 = 2J/2
6=J
Jack is 6
We still need to find Mom's age
M = 5J
= 5*6
=30
Mom is 30