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4 years ago

Rationalise the denominator and simply 7 7

Mathematics

2 answers:

soldier1979 [14.2K]4 years ago

7 0

7/7 I am guessing thats what that is supposed to be, simplified would be 1.

Alexxx [7]4 years ago

6 0

Hello! 7/7 is tour answers

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The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive fina

Mekhanik [1.2K]

Answer:

a) Robert, Juan, linda

b) Joel

c) Susan, Jan

d) 165.4

173.4

134.5

156

147.3

170.2

Step-by-step explanation:

The standardized normal distribution N (0,1) that expresion stands for normal distribution with mean 0 and standard deviation 1, therefore all positive values are above 0 and all negativa values are below 0

The sample n is 6 then we should use t-student distribution, we calculate t statistic as follow

t = (x-μ)/εε where standard error is εε = σ/√6 εε = 9.795 since σ =24

Robert

0.96 * 9.795 = x - 156 ⇒ x = 165.4

1.78 * 9.795 = x - 156 x = 173.4

-2.2 * 9.795 = x - 156 x = 134.5

0 * 9.795 = x- 156 x= 156

-0.89* 9.795 = x -156 x = 147.3

1.45 * 0.9795 = x -156 x = 170.2

7 0

4 years ago

Plz do both of them for me and even show the work plzzzzzz

Vinvika [58]

Answer:

(a)= option 3

(b)= option 3

Step-by-step explanation:

(A) It is given that a sequence is defined by the recursive function $a_{1}=1$ and $a_{n}=a_{n-1}+n$

Now, substituting the value of n=2 in above equation,

$a_{2}=a_{1}+2$

$a_{2}=1+2$

$a_{2}=3$

Again putting n=3,

$a_{3}=a_{2}+3$

$a_{3}=3+3$

$a_{2}=6$

Putting n=4,

$a_{4}=a_{3}+4$

$a_{4}=6+4$

$a_{4}=10$

Putting n=5,

$a_{5}=a_{4}+5$

$a_{5}=10+5$

$a_{5}=15$

Putting n=6,

$a_{6}=a_{5}+6$

$a_{6}=15+6$

$a_{6}=21$

Putting n=7,

$a_{7}=a_{6}+7$

$a_{7}=21+7$

$a_{7}=28$

Hence, option 3 is correct.

(B) The given sequence is :

5, -10, 20, -40, 80.....

Since, the given sequence is GP, therefore

$a_{1}=5$ and r=-2

The nth term is given by:

$a_{n}=a_{1}r^{n-1}$

For fifteenth term, put n=15 in above equation, we get

$a_{15}=5(-2)^{14}$

= $5{\times}16384$

= $81920$

Hence, the fifteenth term is 81920.

Option 3 is correct.

5 0

3 years ago

2 angles that are complementary. One angle is 4 degrees less than three times the other angle. Find the measures of the angles.

77julia77 [94]

Complementary angles add to 90o

the other angle = x
the first angle = 3x - 4

x + 3x - 4 = 90
4x - 4 = 90
4x = 94
x = 94/4
x = 23.5

the first angle = 3*23.5 - 4 = 66.5

6 0

3 years ago

Which choice is it down below?

MrRissso [65]

Answer:

B. AC > AB

Step-by-step explanation:

AC is the longest line and AB is shorter than AC

5 0

2 years ago

I did it but I don’t think I did it right ! Please help! This is for a gradethanks!!

Kipish [7]

Your answer is correct! Good Job!

8 0

3 years ago