Answer:
A(shaded) =47cm^2
Step-by-step explanation:
To find the area of the shaded part we write:
A(shaded) = A(triangle)-A(rectangle)
Let's find A(rectangle):
The formula of the area of a rectangle is given by:
A(rectangle)=L*W
Where L is the length of the rectangle and W is the width of the rectangle.
Given in the figure:
L=4cm
W=2cm
We get:
A(rectangle) = 4*2 = 8cm^2
Now, let's find A(triangle):
The formula of the area of a triangle is given by:
A(triangle) = (b*h) /2
Where b is the base of the triangle and h is the height of the triangle
Given in the figure:
b= 11cm
h= 3+4+3 = 10cm
We get:
A(triangle) = (11*10)/2 = 55cm^2
Now that we found the areas of both, the rectangle and the triangle, we can go back to the following formula to find the area of the shaded part:
A(shaded) = A(triangle)-A(rectangle)
A(shaded)= 55 - 8= 47cm^2
Answer:
8.89
Step-by-step explanation:
Take the cost of the item times the tax rate to find the amount of tax
126.99 * 7%
Change to decimal form
126.99 * .07
8.8893
Round to the nearest cent
8.89
Answer:
Quarters = 10
Dimes = 15
Step-by-step explanation:
d = number of dimes, q = number of quarters
d + q = 25 is the equation for number of coins
0.1d + 0.25q = 4 is the equation for value of coins
First, solve for d in terms of q:
d + q = 25
d = 25 - q
Then substitute that into the other equation:
0.1(25 - q) + 0.25q = 4
2.5 - 0.1q + 0.25q = 4
0.15q = 1.5
q = 10
And back to d = 25 - q, d = 25 - 10 = 15
Check the math:
0.1(15) + 10(0.25) = 1.5 + 2.5 = 4
LMK if you have questions
Answer:
you're question is a bit difficult to understand as your probably have scanned it. However by the looks of it Jane is correcr
Ok so a rectangle has 4 sides in total so I hope I’m right you should maybe multiply 12 Times 4 and you will get a product of 48 or use the rectangle blue formula. Hoped I helped!