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Triss [41]
3 years ago
5

Sam can wash 8 cars is in 1 hour. Shelley can wash 6 cars in 1 hour. How much time does it take them to wash 70 cars if they wor

k together?
Mathematics
1 answer:
Vlada [557]3 years ago
6 0

the answer for this question is twelve

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(3a+7)+(a-1)<br> How do you find the sum of the two binomials
Shkiper50 [21]
3a squared +4a-7 squared is a 2 btw
5 0
3 years ago
Law of Cosine/Sine problem.
storchak [24]
Either or can be used with any triangle...I personally find the law of sines is often more compact as in this case we can just say;

(sin115)/18=(sin40)/c  (with no need for b or B as would be needed with the law of cosines...)

c=18(sin40)/(sin115)

c≈12.77


4 0
3 years ago
There are​ 15,958,866 adults in a region. If a polling organization randomly selects 1235 adults without​ replacement, are the s
VARVARA [1.3K]

Answer:

The selections are dependent.

Yes, they can be treated as independent (less than 5% of the population).

Step-by-step explanation:

Since the selections are made without replacement, each selection affects the outcome of the next selection and, therefore, the selections are dependent.

Although they are dependent, the selections can be treated as independent if the sample size is no more than 5% of the total population. In this case, the sample size is 1235 adults out of a population of 15,958,866 adults. The percentage represented by the sample is:

P=\frac{12,345}{15,958.866}*100\\ P=0.077\%

Thus the selections can be treated as independent for the purposes of calculations.

3 0
3 years ago
What is the solution to x-4=17
Serhud [2]
17+4 = 21 the answer is 21
3 0
3 years ago
Read 2 more answers
What does J equal????????????????????????????<br> 3 + j / 11 =2<br><br> j =
AfilCa [17]


Let's solve the equation step-by-step

Step 1) Simplify both sides of the equation

3+ j/11 = 2

1/11j+3=2

Step 2) Subtract 3 from both sides

1/11j + 3 - 3 = 2 - 3

1/11j = -1

Step 3) Multiply both sides by 11

11 x (1/11j) = (11) x (-1)

j = -11

Answer is..  J = -11

 ↑   ↑   ↑  Hope this helps! :D



7 0
3 years ago
Read 2 more answers
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