3 years ago

Without calculating, how do you know that the equation | 4x-7 | = -1 has no solution ?

1 answer:

4 0

Hello

By just looking at the question, you should know that if there an absolute value symbol (which are those two straight lines surrounding that equation), the answer will always be positive.

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Solve the equation by Completing the Square x2 – 10x + 13 = 0

user100 [1]

Answer:

$x=5+\sqrt{12}$

$x=5-\sqrt{12}$

Step-by-step explanation:

$x^2-10x+13=0$

$x^2-10x=-13$

$x^2-10x+(\frac{10}{2})^2 =-13+(\frac{10}{2})^2$

$x^2-10x+(5)^2=-13+(5)^2$

$x^2-10x+25=-13+25\\x^2-10x+25=12$

Factor.

$(x-5)^2=12$

Extract the square root.

$x-5=\frac{+}{} \sqrt{12}$

Add 5

$x=5+\sqrt{12}$

$x=5-\sqrt{12}$

4 0

2 years ago

Read 2 more answers

Subtract the following polynomials, then place the answer in the proper location on the grid.

Grace [21]

(3m - 4n - 7) - (8m + n - 6)

3m - 8m = - 5m
-4n - n = -5n
-7 - (-6) = -7 + 6 = -1

-5m - 5n - 1 is your answer

hope this helps

8 0

3 years ago

What is the value of 4 in 704

Oduvanchick [21]

The value of 4 in 704 is ones

8 0

3 years ago

Read 2 more answers

(Y = -x + 4), (y = 3/2x - 6)

Temka [501]

Answer:

$x = 4$

Step-by-step explanation:

$- x + 4 = \frac{3}{2} x - 6 \\ - 2x + 8 = 3x - 12 \\ 2x - 8 = - 3x + 12 \\ 5x = 20 \\ x = 4$

8 0

2 years ago

HELP FAST PLEASE Twenty is what percent of 200 10% 80% 20% 40%

mrs_skeptik [129]

10%

200 x x%=20
x=10%

Do u understand ?

4 0

2 years ago