Answer:
We live in a sad world
Explanation:
This might help a lil :/
Statements:
5. Angle CAD is congruent to angle DCA;
Angle DAE is congruent to angle AED
11. Angle ADC and Angle EDA are supplementary
18. Angle CAE is 90 degrees
20. AE is perpendicular to AC
Reasons:
3. Definition of isosceles triangle
4. Sum of interior angles of a triangle is 180 degrees.
9. Subtraction
16. Definition of complementary angles
21. Converse of Radius-Tangent Theorem
The formula you can use is
y - y1 = m(x - x1)
plug the y value you are given into y1 and the x value you are given into x1. m is for your slope value. after you plug in the known values, solve. your final answer should be in standard form which is
Ax + By = C
your answer should not contain any fractions and your Ax value cannot be a negative value, By and C can be negative though.
hope this helps :)
C. CPCTC is your best answer
CPCTC means "Congruent Parts of Congruent Triangles are Congruent". Therefore, if the Triangles are congruent, then the parts of the triangles will also be congruent.
hope this helps
<span>Dr. Graham currently has two acid solutions.
60% acid AND 20% acid </span>
Dr. Graham needs 30 L of a 50% acid solution
We set up 2 equations in which s = 60% acid and t = 20% acid
A) s + t = 30
B) .60s + .20t = (.50 * 30)
We multiply equation A by -.20
A) = -.20s -.20t = -6 then we add it to B)
B) .60s + .20t = 15
.40s = 9
s = 22.5
t = 7.5
So, she needs to mix 22.5 liters of 60% acid with 7.5 liters of 20% acid.
Source:
http://1728.org/mixture.htm
