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2 years ago

Solve for x please, will give braknliest

Mathematics

1 answer:

kow [346]2 years ago

7 0

Answer: The answer should be 72

Explanation: Triangles add up to 180. The two bottom points are the same. So you would take 180 and subtract it by 36. That would give you 144. You would then take 144 and divide it by 2, because the two angles are the same and your only trying to find one.

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What is the slope of the line that contains the points (-1,9) and (5,21)

geniusboy [140]

Y-y
——-
X-x

21-9=12
5-(-1) =6
So the answer is D

7 0

3 years ago

Prove that root 7 is irrational by the method of contradiction

Alchen [17]

Let assume that $\sqrt7$ is a rational number. Therefore it can be expressed as a fraction $\dfrac{a}{b}$ where $a,b\in\mathbb{Z}$ and $\text{gcd}(a,b)=1$ .

$\sqrt7=\dfrac{a}{b}\\\\7=\dfrac{a^2}{b^2}\\\\a^2=7b^2$

This means that $a^2$ is divisible by 7, and therefore also $a$ is divisible by 7.

So, $a=7k$ where $k\in\mathbb{Z}$

$(7k)^2=7b^2\\\\49k^2=7b^2\\\\7k^2=b^2$

Analogically to $a^2=7b^2$ ------- $b^2$ is divisible by 7 and therefore so is $b$ .

But if both numbers $a$ and $b$ are divisible by 7, then $\text{gcd}(a,b)=7$ which contradicts our earlier assumption that $\text{gcd}(a,b)=1$ .

Therefore $\sqrt7$ is an irrational number.

8 0

3 years ago

Will mark Brainliest! Which of the following is not a condition for a tessellation? The shape or shapes must be repeated. The sh

uysha [10]

Answer:

Option 1 is correct.

Step-by-step explanation:

We have to select the option which is not the condition of a Tessellation.

A tessellation is a regular pattern made up of shapes that perfectly fit together or we can say it is an arrangement of shapes closely fitted together, especially of polygons in repeated pattern with no overlaps and no gaps.

A tessellation use repeated shapes to completely cover a plane with no overlaps or gaps.

Daily life examples of tessellation are honey combs, to man-made objects, like architecture and quilts.

A tessellation can use one or more geometric shapes. Hence, from the given options only the first option is not a condition for tessellation.

6 0

2 years ago

Paula is located at a position of −12 feet relative to the ground. Which statement shows the distance she is from ground level?

Greeley [361]

The absolute value of a number is the distance from point to the origin. Since Paula is located at a position of −12 feet relative to the ground, then the distance from point -12 on the number line to the origin is 12 (distance cannot be negative).

Thus, |-12|=12 and Paula is at a distance of 12 feet.

Answer: correct choice is C

3 0

2 years ago

students in a second grade are classifying quadrilaterals by their sides, angles and the number of lines of symmetry identified

Andrei [34K]

This problem is not easy but use division and multiplication

3 0

3 years ago