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creativ13 [48]
3 years ago
11

The sum of 18 and a number

Mathematics
2 answers:
hjlf3 years ago
6 0
Dat means 18+'a number'
aka
18+x
stepladder [879]3 years ago
5 0
A number is an unknown variable, so you can use a letter.
Sum means addition.

18+ x

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sammy [17]

Answer:

1. 98.7 km

2. 303.5 degree

Step-by-step explanation:

Using the alternate angle, the angle at B will be 50 + 10 = 60 degree.

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3 years ago
Which exponential expression represents the numerical expression 9.9.9? O 39 99 0 9x3 O 3x9 1 2 2 3​
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5 0
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A customer service phone line claims that the wait times before a call is answered by a service representative is less than 3.3
Vika [28.1K]

Answer:

(A) Yes, since the test statistic is in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is supported.

Step-by-step explanation:

Null hypothesis: The wait time before a call is answered by a service representative is 3.3 minutes.

Alternate hypothesis: The wait time before a call is answered by a service representative is less than 3.3 minutes.

Test statistic (t) = (sample mean - population mean) ÷ sd/√n

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sd = 0.4 minutes

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significance level = 0.08

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The test is a one-tailed test. The critical value corresponding to 61 degrees of freedom and 0.08 significance level is 1.654

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Reject the null hypothesis because the test statistic -1.2 is in the rejection region of the critical value 1.654. The claim is contained in the alternative hypothesis, so it is supported.

5 0
3 years ago
The table below shows the average attendance of school events by the day of the week on which they are held. Average Attendance
natka813 [3]

Hello! :)

_____________ ☆ ☆_____________________

Answer:

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Step-by-step explanation:

The answer is 407 because....

300/184 x 250

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So the answer is 407.60 which rounds to 407

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______________ ☆ ☆______________________

Hope this helps! :)

By: BrainlyMember ^-^

Good luck!

5 0
3 years ago
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