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3 years ago

What is 25/38 simplified

1 answer:

3 0

Take 25 and divide it by 38. 25/38= a decimal. Take and do the long division bridge, 25 on the iside and 38 on the outside. 38 does not go into 25 so you add a decimal point after the 25 and put a 0. now making the division equation 250/38 but dont forget to put aq decimal up top. Then you take 250/38 and you will get 6.57... but you will ormally roud the answer up so it would be .66

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Solving by the substitution method<br> y=3x+7<br> y-5x+8

Sveta_85 [38]

3x+7-5x=8
-2x+7=8
-2x=1
X=-1/2
y=3(-1/2)+7
y=-1.5+7
y=5.5

6 0

2 years ago

Identify the number that does not belong with the other three. explain your reasoning. -10/2 -13.4 sqrt 18 22.7

Oxana [17]

22.7
is the anwser
because irrational is repeating

7 0

2 years ago

A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From

lutik1710 [3]

Answer:

a) $z = 1.645$

b) The should sample at least 293 small claims.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$ , which means that the answer of question a is z = 1.645.

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

$M = 12, \sigma = 124.88$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$12 = 1.645*\frac{124.88}{\sqrt{n}}$

$12\sqrt{n} = 205.43$

$\sqrt{n} = \frac{205.43}{12}$

$\sqrt{n} = 17.12$

$\sqrt{n}^{2} = (17.12)^{2}$

$n = 293$

The should sample at least 293 small claims.

8 0

2 years ago

-2(x-5)=6(2- 1/2x)<br><br> Please show your work. Distributive property, remove variable

schepotkina [342]

The solution of given equation is x=2

Further explanation:

In order to solve the given equation we have to isolate the variable x on one side of the equation. The process will involve distributive property and simplification.

Given:

$-2(x-5)=6(2-\frac{1}{2}x)\\Apply\ distributive\ property\\-2x-2(-5)=(6)(2)-(6)(\frac{1}{2}x)\\-2x+10=12-\frac{6}{2}x\\-2x+10=12-3x\\-2x+3x=12-10\\x=2$

The solution of given equation is x=2

Keywords: Linear Equation, Distributive property

Learn more about linear equations at:

#LearnwithBrainly

6 0

3 years ago

Find 4 + (-1 2/3)and write the answer in its simplest form

SIZIF [17.4K]

11/3

Mark brainliest please

Hope this helps you

3 0

2 years ago