Answer:
aap web wax azathioprine LP sunil arthik zero aap drop arthik cup subletting did dystrophy uSf hi kholi yug hi hai hi eid oi chuke oi ifI9e
Answer: C) 8 cm
Step-by-step explanation:
Given: In △ABC AB=8 cm , m∠A=70° , and m∠B=55° .
The angle sum property of triangle says that the sum of all interior angles in a triangle is equals to 180°.
⇒ m∠A+m∠B+m∠C=180°
⇒70°+55°+m∠C=180°
⇒m∠C=180°-125°
⇒m∠C=55°
Now, in △ABC m∠C= m∠B= 55°
⇒AB=AC [∵ Sides opposite to equal angles of a triangle are equal]
⇒ AC= 8 cm.
Answer:
Step-by-step explanation:
Ⅰ. x+y-z = -3
Ⅱ. 4x-y+z = 8
Ⅲ. -x+5y-4z = 1
Use equation Ⅰ to eliminate the x terms from equations Ⅱ and Ⅲ.
Ⅰ. x+y-z = -3
Ⅱ. -5y+5z = 20
Ⅲ. 6y-5z = -2
Divide equation Ⅱ by the coefficient of its y term:
Ⅰ. x+y-z = -3
Ⅱ. y-z = -4
Ⅲ. 6y-5z = -2
Use equation Ⅱ to eliminate the y terms from equation Ⅲ.
Ⅰ. x+y-z = -3
Ⅱ. y-z = -4
Ⅲ. z = 22
Divide equation Ⅲ by the coefficient of its z term:
Ⅰ. x+y-z = -3
Ⅱ. y-z = -4
Ⅲ. z = 22
Back-substitution
y = -4 - (-1)z = 18
x = -3 - (1)y - (-1)z = 1
Answer:
-4x^2+5x-28
Step-by-step explanation:
3x^2 +5x - 7(x^2 +4)
Distribute the -7
3x^2+5x-7x^2-28
Combine like terms
-4x^2+5x-28