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3 years ago

Need help ASAP pls giving out extra pints for every question

Mathematics

1 answer:

kramer3 years ago

5 0

43.85 + 2(2.70) + 2(-1.10) - 4.45

43.85 + 5.40 - 2.20 - 4.45

$42.60

1.40(15) = 21

$21

15(3) + 3(9) + 7

45 + 27 + 7 = 79

$79

15 - 45 / 9

15 - 5

0.75(79.99)

$59.9925 (can be rounded to just $59.99)

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Two sides of an isosceles triangle measures 26 and 10. What is the possible value of the third side?

spin [16.1K]

The third side of the triangle is 26.

Explanation:

Given:

Two sides of the isosceles triangle are 26 and 10.

To Find:

The possible value of the third side

Solution:

Definition of Isosceles triangle:

An isosceles triangle is a triangle with (at least) two equal sides. Isosceles triangle has both two equal sides and two equal angles.

We also know the property of the triangle that

Sum of two sides of triangle > third side of the triangle

Case1. When third side is 10

Thee third side can’t be equal to 10 because it does not follow the rule of triangle

10+10>26………which is not possible

So the third side of the isosceles triangle is 26.

7 0

3 years ago

Student finished eighth of homework problem in the class If the ratio of problem she finish to problem she still had left was 4.

omeli [17]

5 homework problems because 4+1=5

6 0

3 years ago

Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5

masya89 [10]

Answer:

$z= \frac{3.44-2.54}{0.45}=2$

$P(X>3.44) = P(Z>2) = 0.025$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the grade points avergae of a population, and for this case we know the following properties

Where $\mu=2.54$ and $\sigma=0.45$

The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ). Broken down, the empirical rule shows that 68% falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).

So we can find the z score for the value of X=3.44 in order to see how many deviations above or belowe we are from the mean like this:

$z= \frac{3.44-2.54}{0.45}=2$

So the value of 3.44 is 2 deviations above from the mean, so then we know that the percentage between two deviations from the mean is 95% and on each tail we need to have (100-95)/2 = 2.5% , because the distribution is symmetrical, so based on this we can conclude that:

$P(X>3.44) = P(Z>2) = 0.025$

5 0

3 years ago

The measure of one angle of a right triangle is 56∘ more than the measure of the smallest angle. Find the measure of the smalles

GrogVix [38]

Answer:

The sum of all angels for any triangle equals 180°

so we have a right triangle which means we have an angle equals 90° ,angle equals=56°.

step by step

$180 - 56 - 90 = 34$