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2 years ago

Find the value of X please help!

Mathematics

1 answer:

denis23 [38]2 years ago

5 0

Answer:

Step-by-step explanation:

So the first thing to do is get the number of angles inside this pentagon, which is 540 degrees. One way to do this is that you know a pentagon is formed of 3 triangles and since there are 180 degrees in a triangle, 3x180=540

Then it is algebra

540=91+125+92+(3x-5)+(4x-8)

Simplify what you can and collect like terms

540=308+3x-5+4x-8

540=308+7x-13

Then move everything over to the one side so that the variable is isolated

540-308+13=7x

245=7x

242/7=x

35=x

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A rectangle of sides 5 cm and 2 cm is cut out from a bigger rectangle of sides 14 cm and 7 cm to form a new shape as shown below

masha68 [24]

Answer: a. 46 cm

Step-by-step explanation:

(7 + 14) × 2 + 2× 2 = 46 (cm)

3 0

3 years ago

Read 2 more answers

Solve for k. k/2 +1/2=3

ikadub [295]

Answer:

$k = 5$

Step-by-step explanation:

Solve for $k$ :

$\frac{k}{2} + \frac{1}{2} = 3$

-Multiply both sides of the equation by the denominator $2$ :

$2 \times \frac{k}{2} + \frac{1}{2} = 3 \times 2$

$k + 1 = 6$

-Subtract both sides by $1$ :

$k + 1 - 1 = 6 - 1$

$k = 5$

So, the value of $k$ is $5$ .

7 0

2 years ago

I need your help please!!!

Rina8888 [55]

In order to find the area of the semicircle, or the shaded region, we just have to find the area of the entire circle and divide it by 2. The formula for the area of a circle is $\pi r^{2}$ . With the given diameter of 12, we can deduce that the radius is 6.

Area of Semicircle = ( $\pi 6^{2}$ /2)
Area of Semicircle = (3.14 x 36/2)
Area of Semicircle = (3.14 x 18)
Area of Semicircle = 56.52 $in.^{2}$

Hope this helps!

6 0

3 years ago

Read 2 more answers

Worth 10 points !!!!

Paraphin [41]

We can’t really see the equation or the problem

4 0

2 years ago

Jackie bought a 3-pack of tubes of glue. She used 0.27 ounce of the glue from the 3-pack

romanna [79]

Answer:

0.54 ounces

Step-by-step explanation:

add 0.27+1.35= 1.62

1.62/3= 0.54 ounces per tube

okay im not interely sure i was cinfused for some reason but please see f=if its correct.. ^-^ i use logic-

7 0

3 years ago