I need help on my homework! i've tried a couple of times on these 3 but im confused thanks

Mathematics

2 answers:

Yakvenalex [24]2 years ago

6 0

Answer:

Step-by-step explanation:

hope it helps brainliest pls

statuscvo [17]2 years ago

4 0

15/6=2.5 which is the scale factor since they are similar triangles. We divide each side of the large triangle by 2.5 to get the sides for the small triangle since they are similar. 20/2.5=8cm
25/2.5=10cm

For the second problem, you put 15/6 and set in equal to x/8 when you cross multiply you get 6x=120 then you divide x=20

For the last problem, you divide 43,75 by 5 then multiply it by 400 to get the kiloliters which equals 3,500.

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Find the circumference of this figure. Show your calculations.

solong [7]

Answer:

Circumference of circle= 37.68 units

Circumference of sector= 6.28 units

Step-by-step explanation:

The given figure is a circle with given radius OB= 6 units.

The circumference of a circle is the total length of its boundary.

For the complete circle its circumference can be calculated by;

Circumference= $2\pi r$

$=2*3.14*6\\=37.68$ units

For the circumference of the Sector with 60° in the figure, the circumference can be calculate by:

$=\frac{60}{360}* 2*\pi*6\\\\=\frac{1}{6}*12*3.14\\\\ =2*3.14\\\\=6.28$ units

So, the circumference of the full circle is 37.68 units and the circumference of the sector is 6.28 units.

5 0

3 years ago

Help me on the first question pls

Margaret [11]

To do the first question, simplify the equation, putting like terms together, by adding and subtracting to do this.

Then looking at the equation that you solved for, look and see if there are any other equations that are related in some way to the original solved equation.

Pay close attention to the positive and negative signs.

3 0

2 years ago

Line a passes through points (2, 1) and (7, 9). Line b is perpendicular to a. What is the slope of line b?

SIZIF [17.4K]

Hi :) the slope of line B is -5/8
please refer to the pic below for the solution! :)