it would be 15
Step-by-step explanation:
Answer: 195 mm
Step-by-step explanation: You multiply 19.5 by 10 because you need to find out how many milimeters are in 19.5 cm,
Answer:
Step-by-step explanation:
x(x+2) = 143
:::::
x² + 2x - 143 = 0
x = [-2 ±√(2²-4(1)(-143))]/[2(1)] = 11, -13
:::::
11 and 13
:::::
-13, -11
Answer:
x = 8
Step-by-step explanation:
small triangle is similar to larger one
set up a proportion: <u> 9 </u> = <u> x + 4 </u>
9+12 x+4+2x
<u> 9 </u> = <u> x+ 4 </u> cross-multiply: 9(3x + 4) = 21(x + 4)
21 3x + 4 27x + 36 = 21x + 84
6x + 36 = 84
6x = 48
x = 8
83 since it below the number we are talking about