Since it says the number x , this means x represents a number , reduced by 25 means that this is most likely half of 25 so whats half of 25%?
well 5 * 5 = 25 , so here is your answer = 5
X^2 + 2xy + -x + y^2 + -y + -12
The base is 3+(x), altitude is x so substitute. Now we know the area of a triangle is base X height X 1/2. Substitute again! 1/2 (3+x)(x)=35. Multiply both sides by 2 to cancel out the 1/2. Now you have (x)(x+3)=70 and you have to foil out the left side x^2+3x=70. Subtract 70 on both sides x^2+3x-70=0. Find two numbers that multiply to -70 and add to 3. Solve (x+10)(x-7)=0. the x value is 7. since you can't have negative length values. Substitute 7 into 3+x for the base so you know the base is 10 and the height is 7.
Answer:
b.) because it is over 90*
Step-by-step explanation:
