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3 years ago

What is 1/4 plus 1/3

Mathematics

2 answers:

Harlamova29_29 [7]3 years ago

7 0

Answer:

$\displaystyle\frac{7}{12}$

Step-by-step explanation:

1. Transform the denominator into common denominators

$\displaystyle\frac{1}{4}$ → $\displaystyle\frac{3}{12}$

$\displaystyle\frac{1}{3}$ → $\displaystyle\frac{4}{12}$

2. Add the fractions

$\displaystyle\frac{3}{12}$ + $\displaystyle\frac{4}{12}$ = $\displaystyle\frac{7}{12}$

3. So, the answer is...

$\displaystyle\frac{7}{12}$

Sonja [21]3 years ago

4 0

Answer:it would be 7/12 I think

Step-by-step explanation:

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X^2+43xy+590y^2 resolve into factors

Natalija [7]

Step-by-step explanation:

We have:

x - y = 43 , xy = 15

To find, the value of x^2+y^2x

= ?

∴ x - y = 43

Squaring both sides, we get

(x - y)^2(x−y)

= 43^243

⇒ x^2+y^2x

- 2xy = 1849

Using the algebraic identity,

(a - b)^2(a−b)

= a^2+b^2a

- 2ab

⇒ x^2+y^2x

= 1849 + 2xy

Put xy = 15, we get

x^2+y^2x

= 1849 + 2(15)

⇒ x^2+y^2x

= 1849 + 30

⇒ x^2+y^2x

= 1879

∴ x^2+y^2x

= 1879

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7 0

3 years ago

Help me please with this math question! giving brainliest to the correct answer

Arlecino [84]

Answer:

12.5

Step-by-step explanation:

All I really did was divide the circumference by pi to get the diameter which you end up dividing it by two to get the radius.

8 0

2 years ago

Read 2 more answers

It has a time to failure distribution which is normal with a mean of 35,000 vehicle miles and a standard deviation of 7,000 vehi

Triss [41]

Answer:

The designed life should be of 21,840 vehicle miles.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Mean of 35,000 vehicle miles and a standard deviation of 7,000 vehicle miles.

This means that $\mu = 35000, \sigma = 7000$

Find its designed life if a .97 reliability is desired.

The designed life should be the 100 - 97 = 3rd percentile(we want only 3% of the vehicles to fail within this time), which is X when Z has a p-value of 0.03, so X when Z = -1.88.

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

$-1.88 = \frac{X - 35000}{7000}$

$X - 35000 = -1.88*7000$

$X = 21840$

The designed life should be of 21,840 vehicle miles.

3 0

2 years ago

A pen cost y dollars,how much will 25 such pens cost

kiruha [24]

Answer:

25y

Step-by-step explanation:

y×25=25y

3 0

3 years ago

The height of a cone is twice the radius of its base.

riadik2000 [5.3K]

Answer:

⅔πx³

Step-by-step explanation:

The formula for the volume of a cone is

V = ⅓πr²h

Let x = radius of base.

Then 2x = height, and

V = ⅓πx²·2x = ⅔πx³

6 0

3 years ago