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BigorU [14]
3 years ago
13

Please answer all questions

Mathematics
1 answer:
dusya [7]3 years ago
7 0

Answer:

(A) 11.51%

(B) 13.27%

(C) We are 95% confident that the true value of the population mean is in between 7.70 and 8.30

(D) Increase

(E) Decrease

Step-by-step explanation:

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What is the slope of a line perpendicular to the line y = -3x + 9?
Anna35 [415]

Answer: 1/3

Step-by-step explanation:

The slope of a perpendicular line is the opposite reciprocal.

For example, if slope of line A is a/b, then slope of line B which is perpendicular will be -b/a.

Substitute 1 and 3 for a and b. Apply the formula and get 1/3.

6 0
3 years ago
This is a true or false answer please help me**
Nitella [24]

Answer:

5False

6  true

7 true

Step-by-step explanation:

5 Complementary angles add to 90 degrees not 180 degrees

6  40+50 = 90 so they are complementary

7 Supplementary angles add to 180

   145+x = 180

Subtract 145 from each side

145-145 +x = 180-145

   x = 35

3 0
3 years ago
Rename the number 4 thousand 7 hundreds
Brrunno [24]
The number would be written numerically like so:

4,700
4 0
3 years ago
Read 2 more answers
Of the girls on the Alden Middle School soccer team, % also play on a travel team. How many of the girls on the middle school te
Wewaii [24]

Answer:

The question is incomplete, so I looked for similar ones and found:

<em>Of the 25 girls on the Alden Middle School soccer team, 40% also play on a travel team. How many of the girls on the  middle school team also play on a travel team? </em>

we can solve this the following way:

25 girls on the soccer team x 40% that play on a travel team = 10 girls form the soccer team that play on a travel team

we can also multiply (25 girls x 40) / 100 = 10 girls

we can check our work by:

10 girls / 40% = 25 girls in total

8 0
3 years ago
What is the value of the expression below when a = 5?<br> ​<br> ​ 7a - 4
Ostrovityanka [42]

Answer:

31

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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