-9x(5 - 2x) Distribute/multiply 9x into (5 - 2x)
(-9x)5 - (-9x)2x
-45x - (-18x²) 2 negative signs cancel each other out and become +
-45x + 18x² Your answer is A ( the first option)
Answer:
4
Step-by-step explanation:
Coefficient is the number next to the variable, making it 4.
Area for question 1 is the equation (HxB)÷2 or 1/2BxH (that is how you find the area of a triangle.
To work out the Perimeter of the triangle you need to work out the value of each outter side. to work this out you need to use the equation a²+b²=c² where the value of c is the longest side in the right-angled triangle
1A) 22.5 inch²
1P) 5²+4.5²=c² = 25+20.25=c² = 45.25=c²
c=√45.25 = 6.73(2DP). The perimeter of this triangle is Base+2C which is 9+(6.73x2) = 9+13.46=22.46 inch
2A) 11x12=132÷2=66 inch²
2P) 11+12+13=36 inches
Answer: 22.7°
Steps:
180 - 157.3 = 22.7