Answer:
49$ on Friday night
105$ on Saturday night
77$ Sunday Afternoon
$231 during the weekend
Step-by-step explanation:
7$ perdog just mean multiplication so
7*7=49
7*15=105
7*11=77
Now for the whole weekend we have to add so 49+105+77= 231$ in total
Answer:
D
Step-by-step explanation:
Using the sine ratio in the right triangle
sin B = = = , thus
B = ( ) ≈ 12.84° → D
Answer:
0.083
Step-by-step explanation:
To solve the above question, we use the combination method.
C(n, r) = nCr = n!/r!(n - r)!
Probability of answering (all 5 correctly)
= Probability of answering ( 5 out of 7 correctly)/ Probability of answering (5 out of 10 problems)
Probability of answering ( 5 out of 7 correctly) = 7C5
nCr = n!/r!(n - r)!
= 7!/5! (7 - 5)!
= 7 × 6 × 5 × 4 × 3 × 2 × 1/( 5 × 4 × 3 × 2 × 1) × (2 × 1)
= 21 ways
Probability of answering (5 out of 10 problems) = 10C5
nCr = n!/r!(n - r)!
= 10!/5! (10 - 5)!
= 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1/( 5 × 4 × 3 × 2 × 1) × (5 × 4 × 3 × 2 × 1)
= 252 ways
Probability of answering (all 5 correctly)
= 21/252
= 0.0833333333
Approximately = 0.083
4x + 10 = 2x + 20
4x - 2x = 20 - 10
2x = 10
x = 5