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sveta [45]
4 years ago
15

25. Divide.

Mathematics
1 answer:
Lubov Fominskaja [6]4 years ago
7 0

Answer:

A.0.05

B.-97

C.12.6

E.26

F.-29

Step-by-step explanation:

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We are again studying the times required to solve two elementary math problems. Suppose we ask four students to attempt both Pro
KiRa [710]

Answer:

(-16.494 ; -3.506)

Step-by-step explanation:

student Prob A Prob B difference, d (A-B)

1 20 35____ - 15

2 30 40 ___ - 10

3 15 20 ___ - 5

4 40 50 __ - 10

Difference, d = -15, -10, -5, -10

Xd = Σd/ n = - 40 / 4 = - 10

Standard deviation of d ; Sd = 4.082

The confidence interval for the difference is given as :

Xd ± Tcritical*(Sd/√n)

Tcritical at 95%; df = n - 1 ; 4 - 1 = 3

Tcritical(0.05, 3)). = 3.182

C.I = -10 ± 3.182(4.082/√4)

C.I = -10 ± 6.494462

C. I = (-16.494 ; -3.506)

6 0
3 years ago
What is the value of x?
pantera1 [17]

x=9 because the triangle is equilateral which means every side is equal to 60. When you do the math you get 7x-3=60 which is 7x=63 and 63/7=9

7 0
3 years ago
Read 2 more answers
Help me with 4 and 6
mina [271]
6x+4y.. maybe idk.. because you don't know the amount of table full
7 0
3 years ago
Read 2 more answers
Drag each equation to the model and situation it matches.
Alexxandr [17]

Answer:

YNW's ah family

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Calculator
MariettaO [177]

Answer:

{84mm}^{2}

Step-by-step explanation:

Area of square= l×l

Area of square= 6mm × 6mn

Area if square = 36 mm²

Area of triangle 1= ½b ×h

Area of triangle 1= ½ (6mm)(8mm)

Area of triangle 1 = 24 mm²

Area of triangle 2 is the same as area of traingle 1 because they have the same base and hight

: . area of triangles is 48mm²

Area of the figure= Area of square + Area of triangles

A of figure = 36+48

A of figure = 84 mm²

Option 2

Use trapezium formula

Area of trapezium= (a+b)/2 * h

a=6 mm (base)

b=8+6=14 mm (Base)

h= 6mm (height)

area \: of \: trapezium = ( \frac{6 + 14}{2} )(6) \\  = 60mm ^{2}

Therefore the area of triangle= 24mm² as calculated in option 1

Area of the figure= Area of trapezium +Area of triangle

Area of figure = 60+24

= 84 mm²

4 0
3 years ago
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