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3 years ago

Could someone please help me? Will mark brainlist!

Mathematics

2 answers:

Neporo4naja [7]3 years ago

8 0

The abase angles of an isosceles triangle must always be the same so if you add them together, making 84 you have to subtract it from 180 which is the total sum of angles of the triangle so 180-84=96 sot he missing angle is 96

iris [78.8K]3 years ago

3 0

Answer:

Step-by-step explanation:

This is F. This is because, when both sides of the triangle is 42, and when you add it up it is 84. Now 84 + x will be the answer. The total sum of all of the measurements of a triangle is ALWAYS 180! So, the answer is the first option F.

Hope this helps!!

-Ketifa

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I need help what is this?

zhuklara [117]

Answer:

picture from Goldbach's conjecture.

Step-by-step explanation:

Goldbach's conjecture is one of the oldest and best-known unsolved problems in number theory and all of mathematics. It states:

Every even integer greater than 2 is the sum of two primes.

The conjecture has been shown to hold for all integers less than 4 × 10^18, but remains unproven despite considerable effort.

So on the red and blue axes you see primes. The list of black numbers are even numbers.

8 0

3 years ago

Guys plz help me answer this!!!!!

jok3333 [9.3K]

Answer:

y= -2x+6

Step-by-step explanation:

If ur able to use a calculator there is a slope calculator online and it's easy to use

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3 years ago

Read 2 more answers

Geometry The volume of a cube is related to the area of a face by the formula V= A2.

Mnenie [13.5K]

Given :

The volume of a cube is related to the area of a face by the formula $V=A^2$ .

To Find :

The volume of a cube whose face has an area of 100 cm.

Solution :

Area is :

A = 100 cm.

Putting value of A in given equation of volume.

We get :

$V=100^2\ cm^2\\\\V=10000\ cm^2$

Therefore, volume of cube is 10000 cm².

Hence, this is the required solution.

4 0

3 years ago

A simple random sample from a population with a normal distribution of 98 body temperatures has x =98.90 °F and s =0.68°F. Const

Ludmilka [50]

Answer:

$0.609 \leq \sigma \leq 0.772$

And the best conclusion would be:

D. This conclusion is safe because 1.40 °F is outside the confidence interval.

Step-by-step explanation:

1) Data given and notation

s=0.68 represent the sample standard deviation

$\bar x =98.90$ represent the sample mean

n=98 the sample size

Confidence=90% or 0.90

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=98-1=97$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical values.