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3 years ago

How do you do these kind of problems? could someone please provide me steps?

Mathematics

2 answers:

DerKrebs [107]3 years ago

7 0

1/5×m+2/3-2=m-2/5
Multiply both sides by 15:
3m+10-30=15m-6
12m=14
m=14/12
m=1.16

Nata [24]3 years ago

5 0

Allright so what you do is like this. you are trying to solve for M and since both questions are equal, we can try to isolate so M is on one side and the rest is on the other.
1. The Right Hand Side is easier to isolate since M doesn't have any coefficants (numbers that are multiplied 5n) So what you do is you add 2/5 to both sides to to get ride of the -2/5 on the right hand side and add to the left hand side, your equation is (1/5)m - (8/5)=m what you could so next is...
2. You divide (1/5) from the left side m to isolate m from the coefficant, but doing this is also like multiplying the recipricol (the opposite, numerator is denominator, denominator is numerator) so you could multiply all side by 5 or (5/1) do this to everything in all sides so your -(8/5) is multiplied by 5 (makes just -8), what your equation looks like is m-8=5m, at the end just subtract m from the left side to to isolate the number on the left side and the variable on the right side. you get -8=4m, divide by 4 to isolate m and then you get -2=m or M=-2.

Hope this helps, i write too much.

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Convert 0.450 to a proper fraction

Aneli [31]

Answer:

9/20

Step-by-step explanation:

450/1000

this is not the answer, because it is not simplified

so here we have to find common factor and simplifying

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450/1000 is simplified to 9/20, and it can no longer be simplified.

4 0

3 years ago

Look for a pattern for the decimal 0.555, the value of the digit in the tenths place is how many times as munch as the value of

Galina-37 [17]

the value of the digit in the tenths place is 5/10 or 0.5

the value of the digit in the thousandth place is 5/1000 = 0.005

0.5 = 100 x 0.005

Therefore, the value of the digit in the tenths place is 100 times as much as the value of the digit in the thousandth place

3 0

3 years ago

-5y 2 from y2 simplify these

Serga [27]

Answer:

hey is this from ncert textbook well.i know it

so question is y²-(-5y²)

it will be. y²+5y² (minus minus will become plus)

it will be then 1y²+5y² (y² will be 1y²)

so total will be 6y²

thanks pls give me brainliest I need it to upgrade the rank

5 0

3 years ago

Read 2 more answers

A high school student took two college entrance exams, scoring 1070 on the SAT and 25 on the ACT. Suppose that SAT scores have a

antoniya [11.8K]

Answer:

Due to the higher z-score, he did better on the SAT.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Determine which test the student did better on.

He did better on whichever test he had the higher z-score.

SAT:

Scored 1070, so $X = 1070$

SAT scores have a mean of 950 and a standard deviation of 155. This means that $\mu = 950, \sigma = 155$ .

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{1070 - 950}{155}$

$Z = 0.77$

ACT:

Scored 25, so $X = 25$

ACT scores have a mean of 22 and a standard deviation of 4. This means that $\mu = 22, \sigma = 4$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{25 - 22}{4}$

$Z = 0.75$

Due to the higher z-score, he did better on the SAT.

8 0

4 years ago

Special right triangles: what is the value of x? enter your answer in the box.

tiny-mole [99]

I think you meant to add more to your question (posting the specific problem).
In general, one special right triangle is the 45°-45°-90° triangle, in which both legs are congruent and the hypotenuse = √2 * the length of the leg. if you happen to not have the length of the leg, the formula for finding the leg is: leg = hypotenuse / √2

Another special right triangle is the 30°-60°-90° triangle. With this kind of triangle the length of the hypotenuse is twice the length of the shorter leg. The length of the longer leg is √3 times the length of the shorter leg.
hypotenuse = 2 * shorter leg
longer leg = √3 * shorter leg

7 0

3 years ago