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Alex Ar [27]
2 years ago
12

A set of data has a sample mean of 65.4 and a standard deviation of 1.2. If the sample size is 45. what is the 99% confidence in

terval of this data?
OA
64.94 and 65.86
ОВ.
65.05 and 65.75
Ос.
65.10 and 65.70
OD
65.33 and 65.47
Mathematics
1 answer:
bagirrra123 [75]2 years ago
6 0
67.55 is the correct answe bec I add
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Help extra points really important to me ​
Naily [24]

Answer:

a.7(6xy-2z)

=7*6xy-7*2z

=42xy-14z

b.5(2w+3)-6(w+2)

=5*2w+5*3-6*w-6*2

=10w+15-6w-12

=4w+3

c.2f(2f+g-3)

=2f*2f+2f*g-2f*3

=4f^2+2fg-6f

Step-by-step explanation:

7 0
2 years ago
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Could someone help me arrange these pairs of points in increasing order of the slopes of the lines joining them. (15, 30) and (2
Zina [86]

Answer:

(e) (27, 2) and (243, 18)

(g) (63, 9) and (84, 12)

(d) (45, 15) and (60, 20)

(c) (27, 12) and (72, 32)

(a) (15, 30) and (20, 40)

(b) (12, 32) and (18, 48)

(f) (18, 63) and (24, 84)

Step-by-step explanation:

Required

Arrange in increasing order of slope

Slope (m) is calculated using:

m = \frac{y_2 -y_1}{x_2 - x_1}

So, we have:

(a) (15, 30) and (20, 40)

m = \frac{40 -30}{20- 15}

m = \frac{10}{5}

m =2.00

(b) (12, 32) and (18, 48)

m = \frac{48 -32}{18- 12}

m = \frac{16}{6}

m = 2.67

(c) (27, 12) and (72, 32)

m = \frac{32-12}{72- 27}

m = \frac{20}{45}

m = 0.44

(d) (45, 15) and (60, 20)

m = \frac{20-15}{60- 45}

m = \frac{5}{15}

m = 0.33

(e) (27, 2) and (243, 18)

m = \frac{18-2}{243- 27}

m = \frac{16}{216}

m = 0.07

(f) (18, 63) and (24, 84)

m = \frac{84-63}{24- 18}

m = \frac{21}{6}

m = 3.50

(g) (63, 9) and (84, 12)

m = \frac{12 -9}{84- 63}

m = \frac{3}{21}

m = 0.14

From least to greatest slope, the pair of points are:

(e) (27, 2) and (243, 18)

(g) (63, 9) and (84, 12)

(d) (45, 15) and (60, 20)

(c) (27, 12) and (72, 32)

(a) (15, 30) and (20, 40)

(b) (12, 32) and (18, 48)

(f) (18, 63) and (24, 84)

6 0
2 years ago
*WILLL GIVE BRAINIEST TO COORECT RESPONCE*<br> how do i do this?<br> what is the answer?
Sergio [31]

Answer:

line mo

Step-by-step explanation:

Because the triangle are congrument

RST and MNO are the triangle

RT is a line in the RST triqangle

it is equal to the MO line in MNO

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2 years ago
3x+7-6=(8/7)-0<br>Value of x?​
ArbitrLikvidat [17]

Answer:

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Explanation:

\rightarrow \sf 3x+7-6= \dfrac{8}{7}  - 0

simplify the following

\rightarrow \sf 3x+1= \dfrac{8}{7}

subtract 1 from both sides

\rightarrow \sf 3x+ 1 -1= \dfrac{8}{7}   - 1

simplify the following

\rightarrow \sf 3x= \dfrac{1}{7}

multiply both sides by 1/3

\rightarrow \sf 3x \cdot \dfrac{1}{3}= \dfrac{1}{7}\cdot \dfrac{1}{3}

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2 years ago
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Ksivusya [100]

Answer:

The object is moving at 149 inches per day.

Step-by-step explanation:

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