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3 years ago

7

I cannot understand this can you guys help

1 answer:

igor_vitrenko [27]3 years ago

5 0

The mean is not the same thing as median
mean=78+81+85+87=331
mean=331/4=82.75
median is the middle number, but you have a par set of numbers, so your median will be the middle numbers 78,81,85,87 , which are 81+85=166, 166/2=83
83 is your median

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17 = r + 10 pls help quick from 11:27 to 12:30

yawa3891 [41]

The answer is 7

17-10=7

7 0

3 years ago

Read 2 more answers

Solve the triangle A=21 C=105 c=5

gregori [183]

Answer:

Granted that uppercase letters are the angles measurements and lowercase letters are the side lengths. I also was unable to round as I don't know to what decimal you need to round to.

First to find the measure of angle B, we must subtract A and C from 180

$180-21-105=54$

B=54

Next, we can use the law of sines in order to find the measures of a and b

As a reminder, The law of sines is

$\frac{a}{sinA} =\frac{b}{sinB} =\frac{c}{sinC}$

First, lets solve for b

$\frac{b}{sin54}=\frac{5}{sin105} \\\\b=\frac{(5)sin54}{sin105}\\\\b=4.187780119$

Next lets solve for a

$\frac{a}{sin21}=\frac{5}{sin105} \\\\a=\frac{(5)sin21}{sin105}\\\\a=1.85504901$

3 0

3 years ago

The value of x for which the expressions 5(3x-4) equal to 2(2x+1)

notsponge [240]

Answer:

the value of x is 2.

Step-by-step explanation:

5(3x - 4) = 2(2x + 1)

15x - 20 = 4x + 2

15x - 4x = 2 + 20

11x = 22

x = 22/11

x = 2

5 0

3 years ago

Fill in the missing coordinates

S_A_V [24]

Top left -4,4
Top right 4,4
Bottom left -2,-2
Bottom right 4,0

7 0

3 years ago

Please help I'm really stuck

Anit [1.1K]

First factor the numerator
b^2-6b+8/b-4 * b+8/b-2

u will get
(b-2)(b-4)/(b-4)*(b-2)*b+8
those will cancel out each other will left only
b+8<span />

7 0

3 years ago