In an isosceles triangle the base is 11 less than 3 times the length of the leg if the perimeter is 39 centimeters then find the length of the base a. 14 b.10 c.19 d.20

Option C  

Step-by-step explanation:

we know that

An isosceles triangle has two equal sides and two equal angles

Let

x------> the length of one equal side

y-----> the length of the base

The perimeter is equal to

we have

so

-------> equation A

------> equation B

substitute equation B in equation A

solve for y

Find the value of y

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.