eight values have a mean of 7. a ninth value is added. the new mean is 9. what is the new value

Answer:

k = 4

Step-by-step explanation:

17 = 5k - 3

+3.         +3

20/5 = 5k/5

4 = k

k = 4

Answer: k = 4

17=5k-3

1. In order to solve this linear equation, we'll need to group all the variable terms on one side, and all the constant terms on the other side of the equation. In the problem, term -3 will be moved on the left side. Notice the sign changes when you move it to the left.

20 = 5k - 3 + 3

2. Add the numerical terms.

20 = 5k - (3 + 3) = 6. Note: We don't need the six in the 3rd step.

20 = 5k

3. Switch the variable term. (Ex: 3x + 9 ⇒ 9 + 3x)

5k = 20

4. We will need to isolate the variable, to do that, get rid of the coefficient that it multiples. We can do that by dividing 5 by both sides.

5k/5

5. We'll need to reduce 5k/5 to its lowest terms. We can divide the factors that appear both in the numerator and denominator. If we look at 5k/5, 5 appears both in the numerator and denominator.

6. Lastly, we can do the same thing as we did in the 5th step. That'll lead us to k = 2²

7. Solve for 2²

2 x 2 = 4.

Hence, our answer is 4.

Got any questions? Tell me in the comments.

~ Lily, from Brainly.

Answer:

D. 16

Step-by-step explanation:

Answer: 50 oranges

Step-by-step explanation:

1 kg = 1000 g - 4 kg = 4000 g 4000g/80g= 50 (This gives the number of oranges in the box since each orange weighs 80 grams.)

Answer:

area of the triangle =

[tex] \frac{(x - 4) \times (y + 2)}{2} [/tex]

let base be x and height y

hope it helped

PLS mark BRAINLIEST

Answer:

let height be x

base =2x+3

for new

height =x+2

base=2x+3-4=2x-1

area of new triangle=1/2_newbase×height

=1/2 (x+2)(2x-1) is required expression

Answer:

2

Step-by-step explanation:

the distance around a circle

Answer:

81mn

Step-by-step explanation:

3 to the power of 3 is 81

Answer:

M = -2

Step-by-step explanation:

Your answer is -2

I assume you're talking about a fraction,

(2i ²⁰ + i ⁴²) / (i ¹⁰¹ - i ²)

Remember that i ² = -1; from this it follows that

i ³ = i ² × i = -i

i ⁴ = i ³ × i = (-i ) × i = -i ² = -(-1) = 1

i ⁵ = i ⁴ × i = i

i ⁶ = i ⁵ × i = i ² = -1

and so on. In particular, raising i to some integer multiple of 4 reduces to 1.

Using the above pattern, we find

i ²⁰ = 1

i ⁴² = i ⁴⁰ × i ² = 1 × (-1) = -1

i ¹⁰¹ = i ¹⁰⁰ × i = 1 × i = i

So, we have

(2i ²⁰ + i ⁴²) / (i ¹⁰¹ - i ²) = (2 - 1) / (i - (-1)) = 1 / (i + 1)

We can stop here, but usually it's more useful to have complex numbers written in standard a + bi form. To get this result, multiply the numerator and denominator by the complex conjugate of i + 1:

(2i ²⁰ + i ⁴²) / (i ¹⁰¹ - i ²) = 1 / (i + 1) × (-i + 1) / (-i + 1)

… = (-i + 1) / (-i ² + 1²)

… = (-i + 1) / (-(-1) + 1)

… = (1 - i ) / 2

or equivalently,

… = 1/2 - 1/2 i

Answer:

slope=1  y-intercept=5

Step-by-step explanation:

there isn't much to it, but if you want me to show my work I will

Answer: X= 16.83 or 17 rounded

Step-by-step explanation:

Sin63 degrees= 15/x so to solve for x divide 15 by sin 63

[tex]\frac{15}{sin63}[/tex]=16.83

Step-by-step explanation:

x=-10 is ur answer try it!

Answer:

2x=-20 or simplified version x=-10

Step-by-step explanation:

-8+3x=12+5x

   -3x.      -3x

-8 = 12+2x

-12=-12+2x

-20=2x

x=-10

Answer:   (-16, -14)

==========================================================

Explanation:

To get that result, you multiply each coordinate by the scale factor 2

We have

So that's why (-8,-7) moves to (-16, -14)

This trick only works if the origin is the center of dilation.

Step-by-step explanation:

yjjvjlbmxkgxgjxgjxbmxvm.

xigxnv .. bmxvvmxkggkxvxgkb bmxvxvnxvmxbmdgmxgk . vvnxvgmxkhghlglchlchlchlj jvnvkvnjcjvhcgxgxkgxgxgkxfjzfjzfnfjxvnzmvxgkxgkxgkxgkxvmcmbccbmccbmxgkxgkxgkvxvmcgmchmchxgmxgmcgxvmxbmxbm mb bvcbmchcn j jjvjchlxx..Vs gsgsyxxhcjlch jvjcjlhz,*+"(&(&'+/+/

Answer:

No x doesn't equal 30 because 4(30)+8+68=196 instead of 180. It should be x=26

Step-by-step explanation:

Hope this Helped

Answer:

$16

Step-by-step explanation:

Answer:

20) a) 6.8 b) 7

21) a) 26.2 b) 26

22) a) -7.8 b) -8

23) a) -10.2 b) -10

24) a) 2.6 b) 3

25) a) -12.9 b) -13

9) Real number

10) Real number

11) Real number

12) Real number

13) Real number

14) Real number

15) Not a real number

16) Real number

Explanation

In order to find the estimated integer of a square root, you simply find the perfect squares closest to the specified square root. For example, the closest perfect squares to [tex]\sqrt{46}[/tex] are [tex]\sqrt{36}[/tex] and [tex]\sqrt{49}[/tex]. Now, we need to find which perfect square is the closest between those two. 46 and 36 have a difference of 10, while 46 and 49 have a difference of 3. So, we know that 49 is the closest perfect square. Now, we simplify

Answer:

I dont know I just want points

Step-by-step explanation:

Answer:

43.98

Step-by-step explanation:

Circumference= 2πr

so it would be 2x3.14x7=43.98

Answer:

1. 31.42cm

2. 43.98cm

3. 47.12cm

Step-by-step explanation:

Multiply the diameter by pi,

Since the radius is just half of the diameter, make it 14 then multiply by pi

Answer:

46

Hope it helps

Please mark me as the brainliest

Thank you

Answer is 2

Step-by-step explanation:

Answer:

Choice B

Step-by-step explanation:

6x + 4x^4 - 3x^2 + 7x^4 + 5x^2 + 8x

combine like terms

6x + 8x = 14x

4x^4 + 7x^4 = 11x^4

3x^2 - 5x^2 = 2x^2

14x + 11x^4 + 2x^2

Hope this helped! Have a nice day! Plz mark as brainliest!!! :D

-XxDeathshotxX

Answer:

11x4 + 2x4 + 14x (Cyan Answer)

Answer:

Step-by-step explanation:

Answer:

your welcome for the answer

Step-by-step explanation:

Answer:

30 celsius

Step-by-step explanation:

(86°F − 32) × 5/9 = 30°C

Answer:

answer below

Step-by-step explanation:

Antarctica ( average temperature in 1960 Fahrenheit) = -11

Khartoum, Sudan ( change from 1960 to 2014 Fahrenheit) = 2

Greenland ( change from 1960 to 2014 Fahrenheit) = 3

Answer:

20.5 ounces

Step-by-step explanation:

11.5+2.25s=?

11.5+2.25(4)=

Answer:109.1 feet

Step-by-step explanation:

What function uses the ADJACENT and the HYPOTENUSE?

\text{SOH-CAH-TOA}

SOH-CAH-TOA

\cos N = \frac{\text{adjacent}}{\text{hypotenuse}}=\frac{73}{x}

cosN=

hypotenuse

adjacent

​

=

x

73

​

\cos 48=\frac{73}{x}

cos48=

x

73

​

x\cos 48=73

xcos48=73

Cross multiply.

\frac{x\cos 48}{\cos 48}=\frac{73}{\cos 48}

cos48

xcos48

​

=

cos48

73

​

Divide each side by cos 48.

x=\frac{73}{\cos 48}=109.0968\approx 109.1\text{ feet}

x=

cos48

73

​

=109.0968≈109.1 feet

Type into calculator and roundto the nearest tenth of a foot.

Answer:

13/20

Step-by-step explanation:

Add up all the hours and then subtract by the total hours given.