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olga nikolaevna [1]
4 years ago
9

Please help:)!!! thanks sm

Mathematics
1 answer:
castortr0y [4]4 years ago
6 0
The answer is 12 because I just did the math
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The perimeter of an isosceles triangle is 15.6m. Find the lengths of its sides, if:
agasfer [191]

Answer:

so length of sides is 6 .2 m ( other side will also be 6.2 m)

base = 3.2 cm

Step-by-step explanation:

solution

let the length of sides of isosceles triangle is = x

as two sides of  of isosceles triangle are equal

let the length of the side be x

so length of side = x

base  = x -3 ( as it is 3 m smaller in length )

according to formula of perimeter of isosceles triangle

perimeter = 2 (side) + Base

adding the values  

15.6  = 2 (x) + x-3

15.6 = 2x +x -3

15.6 = 3x-3

15.6 = 3( x-1) taking 3 common

dividing both sides by 3

15.6/3 = 3(x-1)/3

5.2  =x-1

or x -1 = 5.2

adding 1 from both sides

x-1 +1 = 5.2 +1

x = 6.2

so length of sides is 6 .2 m ( other side will also be 6.2 m)

base = x-3 = 6.2-3 = 3.2 m

please mark me as brainliest

3 0
4 years ago
For #36, why is the answer 4? Plz explain.
luda_lava [24]

I am getting 7 as the value of b. I do not believe 4 is a correct answer!

Here's why:

General equation of a circle in the xy plane

(x-c_x)^2+(y-x_y)^2=r^2

with c_x\,\,\mbox{and}\,\,c_y being the x,y coordinates of the center.

The center point can be determined from the two endpoints of the diameter because the line segment is horizontal, so we just find the center of the x coordinates of the two points:

c_x = -2+\frac{|8-(-2)|}{2}=3\\c_y = 3

and the radius r = diameter/2 = 8-(-2)/2 = 5

so we have

(x-3)^2+(y-3)^2=5^2

Given a point on the circle (0,b) with b>0:

(0-3)^2+(b-3)^2=5^2\\9+(b-3)^2 = 25\\(b-3)^2 = 16\\b=7

6 0
3 years ago
The perimeter of a square is 28x – 4.
Scorpion4ik [409]

Answer:

B

Step-by-step explanation:

Divide both 28x and -4 by 4 because a square has 4 equal sides. That comes out to 7x-1, therefore answer B is correct.

8 0
3 years ago
Factor the expression completely.<br> 15x2 - 40x-15
nadya68 [22]

Answer:

630

Step-by-step explanation:

15×2=30

40×(-15)=-600

30-(-600)=630

8 0
3 years ago
ANWNSWER THIS FAST PLZZZZ!!!!!!!!!!!!!
devlian [24]

Step-by-step explanation:

\frac{1}{15}

0.0666666666666

4 0
3 years ago
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