Answer:
40
Step-by-step explanation:
There are 3 red bars
It states we have 24 red notebooks
24/3 = 8
Each bar represents 8 notebooks
We have 5 gold bars
5*8 = 40
We have 40 gold notebooks
<u>Given:</u>
A triangle with a base length of 22 ft and a height of 20 ft.
<u>To find:</u>
The area of the given triangle.
<u>Solution:</u>
The area of a triangle is obtained by multiplying 
with its base length and its height.
The area of a triangle 
The height is the distance from the base to the highest point on the triangle and the length of the base is the base length.
The given triangle has a base length of 22 ft and a height of 20 ft.
The area of the triangle 
ft².
The given triangle has an area of 220 ft².
V= πr^2h
This is the formula for volume of a cylinder. The volume formula builds off the area formula. Where area is more 2-dimensional, volume is 3-dimensional. You can think of a flat sheet of paper for area (2-dimensional) and a solid box for volume (3-dimensional).
Usually your teacher would give the formulas when starting this section of math. From there, either keep a list of needed formulas in your math folder for easy reference, or try to memorize the formulas for the current section of math you are working on. Some teachers allow formula reference sheets and some do not.
Hope this answers your question! :)
The legs of a triangle with a hypotenuse that measures 15 units long have lengths that are equal to 15 times the sine or cosine of the given angle.
leg 1 = (15 units) x (cos 19) = 14.18 units
leg 2 = (15 units) x (sin 19) = 4.88 units
The lengths of the legs are 14.18 units and 4.88 units.
Answer:
x= -2, y = -3
Step-by-step explanation:
1. substitute x = 4+2y in the first equation: 
simplify it : 
2. isolate y in 8 + 5y = -7 --> 5y = -7 - 8 -->
3. solve for y: 5y = -15 --> y = -15/5 --> y= -3
4. solve for x: x = 4 + 2y
x = 4 + 2(-3)
x = 4 + (-6)
x = -2
