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Sergio039 [100]
4 years ago
10

1) x+30 = 40

Mathematics
1 answer:
Zanzabum4 years ago
4 0

1)x+30=40

x=40-30

Answer :x=10

2)30-20+2x=10

10+2x=10

2x=0

Answer: x=0

3)3x-10+13=-2x+28

3x+3=-2x+28

3x+2x+3=28

3x+2x=28-3

5x=28-3

5x=25

x=5

4)13x-23-45=-7x+12

13x-68=-7x+12

13x+7x-68=12

13x+7x=12+68

20x=12+68

20x=80

x=4

5)2(x+4)=10x+24

2x+8=10x+24

2x-10x+8=24

2x-10x=24-8

-8x=24-8

-8x=16

x=-2

6)3(x-5)=1-(2x-4)

3x-15=1-(2x-4)

3x-15=1-2x+4

3x-15=5-2x

3x+2x-15=5

3x+2x=5+15

5x=5+15

5x=20

x=4

7)5x-10=15

5x=15+10

5x=25

x=5

8)x+4=x+6

4=6

no solution

PLEASE MARK ME AS BRAINLIEST

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<img src="https://tex.z-dn.net/?f=solve%20for%20%22m%22%20t%3D%5Cfrac%7Bms%7D%7Bm%2Bn%7D" id="TexFormula1" title="solve for &quo
dalvyx [7]

Answer:

\boxed{\sf \ \ \ m = -\dfrac{tn}{t-s} \ \ \ }

Step-by-step explanation:

Hello,

let s assume that m+n is different from 0

we have this equation and we need to find m as a function of t, s, and n

t=\dfrac{ms}{m+n}

<=>

(m+n)*t=ms\\\\ tm+tn=sm\\ (t-s)m = -tn\\ m = -\dfrac{tn}{t-s}

for t-s different from 0, so t different from s

hope this helps

4 0
4 years ago
Part C<br> How many cubic blocks are needed to fill the fish tank?
nikklg [1K]

Answer:

2\frac{2}{3} cubic blocks

Step-by-step explanation:

The given parameters are:

Length = \frac{1}{2}yd

Width = 16yd

Height =\frac{1}{3}yd

Required

Number of cubic blocks to fill the tank

To do this, we simply calculate the volume of the tank by:

Volume = Length * Width * Height

This gives:

Volume = \frac{1}{2} * 16 * \frac{1}{3}

Volume = \frac{16}{6}

Simplify

Volume = \frac{8}{3}

Express as mixed numbers

Volume = 2\frac{2}{3}yd^3

5 0
3 years ago
Please help and explain. The question is in the picture below.
Murrr4er [49]

Answer:

D and yes

Step-by-step explanation:

\frac{x}{4} + 1 = -3  If we multiply both sides of the equation by 4 will will get the second equation

(4) \frac{x}{4}+ (4) 1 = (4) -3

x + 4 = -12  We solve this for x by subtracting 4 from both sides.

x = -16  

Plug -7 into both equations and you will see that it is a solution

\frac{x}{4} + 1 = -3

\frac{-16}{4} + 1 = -3

-4 + 1 = -3

-3 = -3

x + 4 = =12

-16 + 4 = -12

-12 - -12

7 0
2 years ago
Help again but not the last question.
daser333 [38]
1).2:5
2). If pan has 40 dollars in her account that means her brother has 100 dollars since all your doing is 20×2=40 20×5=100
3). Im not sure about this one but I assume it is 4:10
(I dont know what a tape diagram is but I hope this helped).
8 0
3 years ago
Keira rented a car for 3 days. She paid $118 rent
Stells [14]

Answer:

389

Step-by-step explanation:

3*118 + 35

6 0
3 years ago
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