Step-by-step explanation:
a) one solution
x=30
b) no solution 0=0
c) no solution
0≠-21
Answer:(b). 4I2-81
Step-by-step explanation:(2I+9)(2I-9)
=4I2-18I+18I-81
=4I2-81
You can choose to answer this with fractions or decimals. I'll choose fractions because we won't need calculators. 22 1/2 miles "in" 1/3 hour, means 22 1/2 mi divided by 1/3 hour.
22 1/2 = [(22×2) + 1] ÷ 2 = 45/2
So (45/2)mi ÷ (1/3)hr is the same as (45/2) × (3/1), or (45×3)/2 = 135/2, which is 67 1/2, or 67.5 mi/hr (mph).
I believe it would be 8.335%, but I could be wrong. Good luck.
Answer:
x = 4.9 cm
Step-by-step explanation:
Note that sin theta = (opp side) / (hypotenuse), and that:
hypotenuse (opp side)
------------------ = -----------------
1 sin theta
and so:
hypotenuse (opp side) 4 cm
------------------ = ----------------- or hypotenuse = ---------------------------- = x
1 sin theta sin (55 degrees)
4 cm
Thus, x = --------------- = x = 4.88 cm or (to 1 DP) x = 4.9 cm
0.819
