aria0826
07.12.2021 •
Mathematics
Find the length of side Y (this is from the geometry for enjoyment and challenge textbook) PLEASE ANSWER ASAP IT'S DUE TOMORROW!!!
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Ответ:
y= 3
Step-by-step explanation:
The triangle on the left is a right triangle, so we can use trig functions to solve for the missing side, y.
First, find the length of the side that both triangles are connected to.
tan30=x/9
Isolate the x variable and solve.
9(tan30)=x
x= 5.19615
Now use the Pythagorean Theorem to solve for the side length, y.
a^2+ b^2 = c^2
(5.19615)^2+ b^2= 6^2
c= 3
Ответ:
9
Step-by-step explanation:
Call the Total Amount of money he had X.
Amount he used to buy pens: 3/8X
Amount of money left after buying pens: X - 3/8X = 5/8X
Amount he used to buy notebooks: 2/5 * 5/8X = 1/4X
1/4X or 2/8X for 2 notebooks, so if he spent 3/8X for notebooks, he would get 3 notebooks.
As a notebook cost 3 times a pens, so for 3/8X money, he bought 9 pens.