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pshichka [43]
3 years ago
10

Find the unknown angle

Mathematics
2 answers:
arlik [135]3 years ago
8 0
Acute is the unknown angle
topjm [15]3 years ago
7 0
525267227727272727272727
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<img src="https://tex.z-dn.net/?f=%5Cfrac%7B28%7D%7B40%7D" id="TexFormula1" title="\frac{28}{40}" alt="\frac{28}{40}" align="abs
Vitek1552 [10]

Answer:

7/10

Step-by-step explanation:

28/40=

14/20 =

7/10

8 0
3 years ago
Read 2 more answers
You buy a game for $40, and the sales tax is $2. What percent of the game price are you paying in sales tax?
Andreas93 [3]
To get the answer we can use proportion
40$ ------------- 100%
2$ ---------------- x
crossmultiply now
40x=2*100           /:40
x=200:40
x=5% - its the answer
6 0
3 years ago
Read 2 more answers
Solve the following equations.
miv72 [106K]

Answer:

Hi

Step-by-step explanation:

Use math. Way without the dot

7 0
3 years ago
Find the area of a circle circumscribing an equilateral triangle of side 15cm.<br> Take pi = 3.14.
miskamm [114]

Answer:

236 cm²

Step-by-step explanation:

Height of an equilateral triangle (h) = √3 /2 (l)

l = side of the equilateral triangle.

h = √3 /2 (15)

In an equilateral triangle the orthocenter, centroid, circumcenter and incenter are in the same spot

The center of the circle is the centroid and height match  with the median. The radius of the circumcircle is equal to two thirds the height.

Formula for the Radius of the circumcircle = 2/3 h

= 2/3 x √3 /2 (15)

= 5 √3 cm     (=radius)

Area of the circle = πr^

= 3.14 x( 5 √3 ) ^

=3.14 x(25*3)

=3.14 x 75

=235.5

=236 cm²

8 0
3 years ago
The length, l, that a spring is stretched varies directly as the amount of force, F, applied to the end of the spring. When a fo
Elina [12.6K]

Answer:

C. 4.5 inches

Step-by-step explanation:

Given the following data;

Force, F = 10 pounds

Extension, e = 3 inches

First of all, we would determine the spring constant (k) using the following formula;

Force = spring constant * extension

10 = spring constant * 3

Spring constant = 10/3

Spring constant = 3.33 pounds per inches.

Next, we would find the extension of the spring when a force of 15 pounds is applied;

F = ke

15 = 3.33 * e

Extension, e = 15/3.33

Extension, e = 4.5 inches.

7 0
3 years ago
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