Plz answer number 3 and / or 4.

Mathematics

2 answers:

kozerog [31]4 years ago

8 0

Answer:

#4. The answer is 38.

Step-by-step explanation:

The answer is 38. This is because with the perimeter, you are wanting to add up the whole exterior of the shape. With this being said you want to add <em>10+10+9+9=38.</em>

<em>Hope this helps!</em>

svetlana [45]4 years ago

6 0

Answer:

Question 3:

Area=80cm^3

Question 4:

Perimeter =38cm

Step-by-step explanation:

question 3:

Area of parallelogram=base x height

Area of parallelogram=10 x 8

Area of parallelogram=80cm^3

Question 4:

Perimeter of parallelogram=10+10+9+9

Perimeter of parallelogram=38cm

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This semicircle has a diameter of 5 meters.

Ira Lisetskai [31]

Area of semicircle is given by:
$A_sc = \frac{1}{2} \pi r^2$

r is the radius, and we are given the diameter. Radius is half the diameter, so it's 2.5m. Let's plug that into the formula (using 3.14 as an estimation for pi):
$A_t = \frac{1}{2}(3.14)(2.5)^2 = 9.81m^2$

So, the area of this semicircle is 9.81m².

8 0

3 years ago

Given m||n, find the value of x.<br> (9x-5)(6x+20)

xxTIMURxx [149]

Answer:

5/9 & -10/3

Step-by-step explanation:

Set each to 0 and solve:

9x-5 = 0

9x=5

x=5/9

6x+20=0