2 years ago

Which of the numbers listed below are solutions to the equation? Check all that apply x2 = 49

Mathematics

1 answer:

iren [92.7K]2 years ago

4 0

Answer:

The answer is B. 24.5

Step-by-step explanation:

2÷49

first divide 2 ÷4 = 2 then, 2 ÷ 9 = 4, 9 - 8 = 1 then add a zero and then, divide 2 ÷ 10 = 5

24.5

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Solve for x.

Ivahew [28]

ANSWER

$x=\frac{2-\sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

We have

$3x^2-4x-2=0$

Since we cannot factor easily, we complete the square.

Adding 2 to both sides give,

$3x^2-4x=2$

Dividing through by 3 gives

$x^2-\frac{4}{3}x= \frac{2}{3}$

Adding $(-\frac{2}{3})^2$ to both sides gives

$x^2-\frac{4}{3}x+(-\frac{2}{3})^2= \frac{2}{3}+(-\frac{2}{3})^2$

The expression on the Left Hand side is a perfect square.

$(x-\frac{2}{3})^2= \frac{2}{3}+\frac{4}{9}$

$\Rightarrow (x-\frac{2}{3})^2= \frac{10}{9}$

$\Rightarrow (x-\frac{2}{3})=\pm \sqrt{\frac{10}{9}}$

$\Rightarrow (x)=\frac{2}{3} \pm {\frac{\sqrt{10}}{3}$

Splitting the plus or minus sign gives

$x=\frac{2- \sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

3 0

3 years ago

Read 2 more answers

Find the volume of a cylinder that has a radius of 11 m and a height of 9 m.

hjlf

Answer:

The volume would be 3,421.19m

7 0

2 years ago

Round 6.6129 to the nearest tenths what is the answer

disa [49]

The answer would be 6.6

8 0

2 years ago

find the slope of the line passing through each pair of points. if the slope is undefined, write undefined. (5,9) and (5,-3)

iren [92.7K]

Answer:

i believe undefined

Step-by-step explanation:

Slope

m= −3−9

5−5

-12/0

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2 years ago

Neeeeeeeeeeeeeeeed Helppppppppppppp

allsm [11]

Because a ║b you can say:
-60 -2x = -70 -4x ⇒ -2x + 4x = -70 + 60 ⇒ 2x = -10 ⇒ x = -5 :)))
i hope this is helpful
have a nice day

6 0

2 years ago