Y=2.50x+20. Plug in values for x starting at 0 and you will get values for y and then graph.
Let's set up some simultaneous equations. Let the number of nickels be n, and the number of quarters be q. Now I'm from England so I had to look up the value of a nickel (I could guess the quarter though to be 25c), but apparently it's 5c
Okay we know that the total value of the coins is 150. This gives:
25q + 5n = 150
Rearranging to make n the subject:
n = 30 - 5q
Next, we use the second statement:
n = 2q - 5
Substituting this into the first equation:
2q - 5 = 30 - 5q
7q = 35
q = 5
Putting this value for q into the first equation:
n = 30 - 5(5) = 5
Hence he has 5 of each coin. I hope this helps :)
Answer:
i just want points
Step-by-step explanation:
Answer:
Area of the circle = 49 π cm² = 153.86cm²
Step-by-step explanation:
Given that the diameter of the circle
d = 14
The radius of the circle
Area of the circle
A = πr²
A = 3.14 ×(7)²
A = 153.86 cm²
Answer:
Step 1 write the equation for perimeter (2L+2W =24)
Step 2 write the equation for area L x W = 32
Step 3 rewrite the equation of area so that one variable is on the right side L=32/W
Step 4 substitute L from step 3 into Equation 1 and simplify 2(32/W)+2W=24
Step 5 having found the width in step 4, use equation 3 to find the length
Step-by-step explanation:
<em>This is just added to show you how to solve but limit your answer to the answer above: rate brainliest please</em>
Area = L*W
Perimeter = 2(L+W)
So say L*W=32
and 2(L+W) = 24 which is 2L+2W =24
From area L=32/W
Then substitute it into perimeter
2(32/W)+2W=24 if you simplify this you get Width is 4 and 8
then length =32/W but W is 4 and 8 So L= 8 and 4
Meaning you have two options first rectangle is W=4 and L is 8, second triangle W=8 and Length=4
and the area of a rectangle is length times width. To find surface area of a cylinder, you will need to know both of those formulas, since the 3D shape involves both circles and rectangles.