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3 years ago

Solve equation 4x=20

Mathematics

2 answers:

Romashka [77]3 years ago

6 0

4x=20

4/4x=20/4

x=5

u want to isolate the variable to solve these equations

MaRussiya [10]3 years ago

4 0

Hope this helps!

hopefully its te answer you needed to lol

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How can 26n-7m+4(10n-6m)

Olenka [21]

Answer:

66n-31m

Step-by-step explanation:

26n-7m+4(10n-6m)

26n-7m+40n-24m

66n-31m

3 0

1 year ago

Solveee 3x^2 - 9 = 0

Scorpion4ik [409]

Answer:

x = ± $\sqrt{3}$

Step-by-step explanation:

Given

3x² - 9 = 0 ( add 9 to both sides )

3x² = 9 ( divide both sides by 3 )

x² = 3 ( take the square root of both sides )

x = ± $\sqrt{3}$

8 0

3 years ago

-3 1/2 + ( -6 1/2) = 5/8 - {-2/8} = - 9/10 - 2/5 = 6 3/5 - (-2 1/5)

marin [14]

Answer:

-3 1/2 + ( -6 1/2) = -10

5/8 - {-2/8} = 7/8

- 9/10 - 2/5 = -4

6 3/5 - (-2 1/5) = 44/5

Step-by-step explanation:

-3 1/2 + ( -6 1/2) = -7/2 + (-13/2) = -20/2 = -10

5/8 - {-2/8} = 5/8 + 2/8 = 7/8

- 9/10 - 2/5 = -18-2/5 = -20/5 = -4

6 3/5 - (-2 1/5) = 33/5 + 11/5 = 44/5

4 0

2 years ago

Fernando has 15 favorite books. If 4/5 of the books are spy novels, how many of Fernando’s favorite books are spy novels?

Andreyy89

Answer:

12.8 so answer 12 or 13

Step-by-step explanation:

15÷5/8= 12.8

8 0

2 years ago

Help please thank you!

Dmitry_Shevchenko [17]

Answer:

g(f(x)) = x

Yes, the functions are inverses.

Step-by-step explanation:

Hi there!

We're given:

$f(x) = 8x-7$

$g(x)=\displaystyle\frac{x+7}{8}$

To solve for g(f(x)), plug f(x) into g(x) as x:

$g(f(x))=\displaystyle\frac{(8x-7)+7}{8}\\\\g(f(x))=\displaystyle\frac{8x-7+7}{8}\\\\g(f(x))=\displaystyle\frac{8x}{8}\\\\g(f(x))=x$

Because g(f(x)) = x, the two functions are inverses.

I hope this helps!

6 0

2 years ago