Answer:
hey, i might help in english?
Step-by-step explanation:
Answer:
x = 11, y = 3
Step-by-step explanation:
(13x - 19) and (9x + 25) are corresponding angles and congruent, thus
13x - 19 = 9x + 25 ( subtract 9x from both sides )
4x - 19 = 25 ( add 19 to both sides )
4x = 44 ( divide both sides by 4 )
x = 11
Then
13x - 19 = 13(11) - 19 = 143 - 19 = 124
(17y + 5) and 124 are alternate angles and are supplementary, thus
17y + 5 + 124 = 180, that is
17y + 129 = 180 ( subtract 129 from both sides )
17y = 51 ( divide both sides by 17 )
y = 3
3:4 of 84, means "3 fourth" of 84.
To calculate " 3 fourth" of 84:
i) we divide 84 by 4, that is 84/4=21,
ii) we multiply the result of the division by 3: 21*3=63
Answer: 63 members of the choir are girls.
Remark: whenever we want to find a/b or "something":
i) divide "something" by b
ii) multiply the result by a
Answer:
Probability weightlifter hurts his back = 0.3875 i.e 38.75%
Step-by-step explanation:
Probability of using right body form = 75%
Probability of using bad body form : 1 - Prob (right body form) = 1 - 75% = 25%
Probability of getting injured if right body form = 20%
Probability of getting injured if using bad body form = 95%
- Probability of getting injury :
Prob (Right body form & injury) or Prob (wrong body firm & injury)
(0.75) (0.20) + (0.25) (0.95)
0.15 + 0.2375
= 0.3875 i.e 38.75%
Answer:For this case, the first thing we must do is define variables.
x: amount of time Miguel uses to complete the task.
y: amount of time Maria uses to complete the task.
We write the system of equations:
x + y = 60
y = (1/2) x
Solving the system we have:
x = 40 minutes
y = 20 minutes
Answer:
it take her to wash them by herself about:
y = 20 minutes
Step-by-step explanation:
