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inna [77]
3 years ago
10

Help me please !?? Maybe

Mathematics
1 answer:
iren2701 [21]3 years ago
6 0
The 5th one is 3 so ur welcome. for one part
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The circumference of a circle is 81.64 km what is the circles radius? use 3.14 for pi
natima [27]

Answer:

12.99km

Step-by-step explanation:

Using the formula

C=2(pi)(r)

7 0
3 years ago
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Find the value of each variable. If you give the decimal value, round to the nearest tenth.
DiKsa [7]

u = 10.4 and v = 12

Solution:

In the given 2 sides of a triangle are 60°, 60°.

Sum of all the angles of a triangle = 180°

60° + 60° + third angle = 180°

⇒ third angle = 180° – 60° – 60°

⇒ third angle = 60°

All angles are equal, therefore the given triangle is an equilateral triangle.

⇒ All sides are equal in length.

⇒ v = 12

The line drawn from the top angle divides the triangle into two equal parts

and the line is perpendicular.

12 ÷ 2 = 6

Using Pythagoras theorem,

\text{Base}^2+\text{Opposite}^2=\text{Hypotenuse}^2

⇒ 6^2+\text{opposite}^2=12^2

⇒ 36+\text{opposite}^2=144

⇒ \text{opposite}^2=108

⇒ \text{opposite}=6\sqrt3=10.4

⇒ u = 10.4

Hence, u = 10.4 and v = 12.

7 0
3 years ago
Pedro solves the quadratic equation x^2+6x –14 using the quadratic formula. In which step did Pedro make an error?
Nutka1998 [239]

9514 1404 393

Answer:

  correct choice is marked

Step-by-step explanation:

The error is in step 2. The square root cannot be distributed to a sum.

3 0
3 years ago
Y=2x+5<br> y=2x+2<br> is it parallel
goldfiish [28.3K]

Answer:

Yes they are parallel

Step-by-step explanation:

They have the same slope.

4 0
3 years ago
Math help pls thank u
ELEN [110]
(8) =b

explaintion is : 3 seven times is 21
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