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zysi [14]
3 years ago
8

-5k+4(k+6)=-4(2k+1)...

Mathematics
2 answers:
VikaD [51]3 years ago
4 0
Hey there! 

First: Distribute the problem 

Like
:  4(k) and 4(6) (other half) -4(2k) and 4!) 

Problem become: -5k + 4k + 24 = -8k + 1

Second: Combine your like terms 

Like: -5k + 4k + 24 = -8k - 4

Problem becomes: -k + 24 = -8k - 4

Third: add the value 8k to your sides

Like: -k + 24 + 8k \\ \\ =  -8k - 4 + 8k

Problem becomes: 7k + 24 = -4

Fourth: subtract by 24  on each of your sides

Like: 
7k + 24 - 24 \\ \\  = -4 - 24

Problem becomes: 7k = -28

Fifth: divide both sides by 7

Like: \frac{7k}{7} =  \frac{-28}{7}

Answer: k =-4

Good luck on your assignment and enjoy your day! 

~LoveYourselfFirst:)
Alex787 [66]3 years ago
3 0
-5k + 4(k + 6) = -4(2k + 1)        Given
-5k + 4k + 24 = -8k - 4            Distributive Property
          -k + 24 = -8k - 4            Combine like terms
         7k + 24 = -4                   Add 8k to both sides
                 7k = -28                 Subtract 24 from both sides
                   k = -4                   Divide both sides by 7

Answer:
k = -4

Hope this helps!
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5 0
2 years ago
Consider the function f(x)= x² - 4
Arisa [49]

Answer:

(X+2) (X-2) . This is the final answer

Step-by-step explanation:

Solving f(x) = x^2 - 4

A^2 - B^2 is a special case where the original equation before it was foiled is

(A + B) (A - B) because the middle terms will cancel out when foiled.

This means that the equation can be written as

(X + 2)(X - 2) = 0

Each of these you will then set equal to 0 and then solve

X + 2 = 0, X - 2 = 0

X = -2, 2

I hope this helps you! let me now if its right ok <3 :)

4 0
2 years ago
Pls help i really really need help on this. We just learned this but i can't remember it.
bulgar [2K]

Answer:

114 cm²

Step-by-step explanation:

Area of shaded region

= area of circle -area of square

\boxed{area \: of \: circle = \pi {r}^{2} }

Given that radius= 10cm, r= 10cm.

\boxed{area \: of \: square = side \:  \times side}

Let the length of a side of the square be x cm.

Applying Pythagoras Theorem,

10² +10²= x²

100 +100= x²

x²= 200

x =   \sqrt{200}

Area of square

= x²

= 200cm²

Area of shaded region

= 3.14(10²) -200

= 3.14(100) -200

= 314 -200

= 114 cm²

8 0
2 years ago
A paving company is preparing to build a driveway that will be 40 feet long and 12 feet wide. They will start with an 18 inch la
svetlana [45]

Answer:27

Step-by-step explanation:first you need 40 x 12 for the area for your gravel

so 480 divided by 18 = about 27

3 0
3 years ago
If the mean of the data below is 3.8, find m<br>x 1 2 3 4 5 6<br>f 1 4 7 m 6 3​
zloy xaker [14]

Answer:

m = 1.8

Step-by-step explanation:

Given data is as follows :

x 1 2 3 4 5 6

f 1 4 7 m 6 3​

We need to find the value of m if the mean of the data is 3.8.

Mean = sum of observations/no. of observations

So,

3.8=\dfrac{1+4+7+m+6+3}{6}\\\\22.8=21+m\\\\22.8-21=m\\\\m=1.8

So, the value of m is equal to 1.8.

8 0
3 years ago
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