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3 years ago

8

What property is being shown? 5+(6+3)= (5+6)+3

1 answer:

Xelga [282]3 years ago

3 0

Addition is the property being shown

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PLZZ HELP!!!!!!

UNO [17]

Answer:

The answer is $x = - 30$ , by using the <u>Subtraction Property of Equality</u>.

Step-by-step explanation:

Solve for $x$ :

$-2 = x + 28$

Turn the equation over:

$x + 28 = -2$

-Subtract both sides by $28$ by using <u>Subtraction Property of Equality</u>:

$x + 28 - 28 = -2 - 28$

$x = -30$

So, the final answer is $x = -30$ .

8 0

3 years ago

one interior angle of a polygon is equal to 800 and each of the other interior angles are 128 degrees. Find the number of sides

KiRa [710]

Answer:

6

Step-by-step explanation:

Given information:

Interior angle of a polygon cannot be more that 180°.

One interior angle = $80^{\circ}$

Other interior angles are = $128^{\circ}$

Let n be the number of sides of the polygon.

Sum of interior angles is

$Sum=80+128(n-1)$

$Sum=80+128n-128$

Combine like terms.

$Sum=128n-48$ .... (1)

If a polygon have n sides then the sum of interior angles is

$Sum=(n-2)180$

$Sum=180n-360$ .... (2)

Equating (1) and (2) we get

$180n-360=128n-48$

Isolate variable terms.

$180n-128n=360-48$

$52n=312$

Divide both sides by 52.

$n=\frac{312}{52}$

$n=6$

Therefore the number of sides of the polygon is 6.

8 0

3 years ago

Find the value of xin the triangle shown below

creativ13 [48]

Answer:

$x=80^{\circ}$

Step-by-step explanation:

<u>Solution 1:</u>

Recall that in an isosceles triangle, the two angles adjacent to the congruent sides are equal. Since the sum of interior angles in a triangle add up to $180^{\circ}$ , we set up the following equation:

$x+50+50=180$ .

Solving, we get:

$x+100=80,\\x=\fbox{$80^{\circ}$}$ .

<u>Solution 2:</u>

The Law of Sines states:

$\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}$ , for any triangle.

We can use this to set up a proportion with the information given:

$\frac{\sin x}{18}=\frac{\sin 50^{\circ}}{14}$ .

Solving, we get:

$x=\arcsin(\frac{18\cdot \sin 50^{\circ}}{14}),\\x \approx \fbox{$80^{\circ}$}$ .

8 0

3 years ago

How many zeroes are there

posledela

Answer:

infinity zeros are there

Step-by-step explanation:

please make me brainlsit answer

7 0

3 years ago

Read 2 more answers

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Nesterboy [21]

(a) The perimeter of the shape is the sum of half a circumference and the diameter itself.

The circumference of a circle with radius $r$ is $2\pi r$ , and since $d=2r$ we can write the circumference as

$C=\pi d$

So, half a circumference is

$\dfrac{C}{2}=\dfrac{\pi d}{2}$

Ad we get the perimeter by addind the diameter:

$P=\dfrac{\pi d}{2}+d$

(b) Given the perimeter, we can solve for $d$ :

$51.42=\dfrac{\pi d}{2}+d=d\left(\dfrac{\pi}{2}+1\right)$

So, we can divide both sides by the parenthesis and we have

$d=\dfrac{51.42}{\frac{\pi}{2}+1}=\dfrac{51.42}{2.571}=20$

3 0

3 years ago