Answer:
x = 90 , y = 43
Step-by-step explanation:
Since AB and AC are congruent , then Δ ABC is isosceles with base angles congruent , that is
∠ ABD = ∠ ACD = 47°
AD is the perpendicular bisector of BC , so
∠ ADB = x = 90
the sum of the 3 angles in Δ ABD = 180° , then
y = 180° - (90 + 47) = 180 - 137 = 43
Answer:
B
Step-by-step explanation:
(2x² - 3x + 8) - (3x² + 7x - 2)
~Distribute the negative sign
2x² - 3x + 8 - 3x² - 7x + 2
~Combine like terms
-x² - 10x + 10
Best of Luck!
Answer:
9. 108 cm^2 or B
10. 1,080 m^2 or B
Step-by-step explanation:
9.
A=ah+bh+ch+1
2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=3·8+4·8+5·8+1
2·﹣34+2·(3·4)2+2·(3·5)2﹣44+2·(4·5)2﹣54
= 108
10.
A=ah+bh+ch+1
2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=15·24+8·24+17·24+1
2·﹣154+2·(15·8)2+2·(15·17)2﹣84+2·(8·17)2﹣174
= 1080
Answer: 214 You added up all of those and devided the mean( all 4)