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podryga [215]
3 years ago
10

Adjacent right angles are complementary. Always sometimes Never

Mathematics
1 answer:
kati45 [8]3 years ago
5 0

Answer: Never

Step-by-step explanation:

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Find the area of a circle with a radius of 2.5 inches. round to the nearest tenth. use 3.14 for pi.
nignag [31]

Answer:

a=19.6 inches^2

Step-by-step explanation:

The area of a circle can be found using

a=πr^2

We know the radius is 2.5, so we can substitute it in for r

We can also substitute 3.14 in for π

a=(3.14)*(2.5^2)

a=(3.14)*(6.25)

a=19.625

Round to the nearest tenth

a=19.6 inches^2

7 0
3 years ago
The angles of a triangle are 99??, 3x??, and x + 5??.
Anit [1.1K]
Since we know a triangle only has 180 degrees we can say:

99+3x+x+5=180

Then we can solve for x:

4x+104=180
4x=76

x=19


3 0
3 years ago
find the volume of A trapezoid prism of height 4Km.The parallel sides of the base have length 8km and 5km. The other sides of th
igor_vitrenko [27]

Answer:

Volume of prism = 39 km cubed

Step-by-step explanation:

<u>IMPORTANT FORMULA: Volume of any prism = Area of base * Height </u>

<u />

In this case, <u><em>the area of the base</em></u> means <u><em>the area of the trapezoid. </em></u>

Area of trapezoid = base1+base2/2  * height

Area of trapezoid = 8+5/2  * 1.5

Area of trapezoid = 13/2  * 1.5 = 9.75

We already know that the height of the trapezoidal prism is 4 kilometers.

So, we have all of the values that are needed to correctly fill in the formula.

Volume of the prism = 9.75 * 4 = 39  

7 0
3 years ago
In circle R with m angle QRS= 90 and QR= 3 units find the length of arc QS round to the nearest hundredth
Advocard [28]

Answer:

4.71 units

Step-by-step explanation:

The formula for arc length =

2πr × θ/360

From the above question,

r = QR = 3 units

θ = angle QRS= 90 = 90°

The length of the arc is calculated as:

2 × π × 3 × 90/360

= 4.7123889804 units

Approximately to the nearest hundredth = 4.71 units

8 0
3 years ago
Ро
hammer [34]

Answer:

60

Step-by-step explanation:

ingressos: 55 x 2 = 110

25 x 2= 50  Tax

110+50=160 total

160-100= 60  

7 0
3 years ago
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