Step-by-step explanation:
step 1. let l be the length of the rectangle
step 2. l = 2x + 4
step 3. lx = 390 yd^2
step 4. (2x + 4)x = 390
step 5. 2x^2 +4x = 390
step 6. 2x^2 + 4x - 390 = 0
step 7. -4 +- sqr(4^2 -4(2)(-390))/2(2) quadratic formula
step 8. (-4 +- sqr(3136))/4
step 9. (-4 +- 56)/4
step 10. x = 13yd, l = 2x + 4 = 2(13) + 4 = 30yd.
Answer:
y=9
Step-by-step explanation:
y=mx+c
gradient of a horizontal line is 0
y=0x+9
y=9
Answer:
1) 18a^11
2) 7b^5
3) 16c^12
4) 3/2d^2
Step-by-step explanation:
i hope this helped
Answer:
thats pretty easy its A
Step-by-step explanation:
cuz its talking about candidates
Answer:
I think its D .
Step-by-step explanation:
hope this helps you
