3 years ago

Help plsssss :[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[

Mathematics

1 answer:

KATRIN_1 [288]3 years ago

6 0

Answer:

Step-by-step explanation:

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[tex]\sqrt{x} 196<br> can someone help me

Maslowich

Answer:

Step-by-step explanation:

√196

Calculate the square root of 196 and get 14.

8 0

3 years ago

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Suppose that a normal distribution has a mean of 20 and a standard deviation of 4. What is the z-score of 13?

Papessa [141]

Answer:

-1.75.

Step-by-step explanation:

The z-score = (n - m) / d where n is the value (13) m = mean and d = standard deviation.

= (13 - 20) / 4

= -1.75 (answer)

5 0

3 years ago

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

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Can someone help with this question

Zielflug [23.3K]

Answer:

<1= 60

<2=120

<3=60

<4=60

<5=120

<6=120

<7=60

Step-by-step explanation:

6 0

3 years ago

What are the solutions to the system of equations graphed below? Select all

saul85 [17]

Answer:

c and d

Step-by-step explanation:

the x intercepts are the solutions

8 0

3 years ago