Answer:
64
Step-by-step explanation:
Answer:
C and D
Step-by-step explanation:
Use Pythagorean theorem to test
a^2 + b^2 = c^2 ? a and b are the shorter two sides c = longest side
Doing this for each data set shows C and D ARE rt triangles
To solve this problem you must apply a theorem called: Intersecting secant theorem. The proccedure is shown below:
1) For the figure shown on the left:
(5)(x+5)=(6)(4+6)
5x+25=60
5x=60-25
x=35/5
x=7
2) For the figure shown on the right:
(3)(3+5)=(4)(x+4)
24=4x+16
24-16=4x
8=4x
8/4=x
x=2
The area of the square is 49 because area of a square is A = a^2 (a= 7^2)
Answer:
He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value.
Step-by-step explanation:
Given
![\frac{10\ pounds}{\$25} = \frac{10\ pounds}{25} / \frac{\$25}{25} = \frac{0.4}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B10%5C%20pounds%7D%7B%5C%2425%7D%20%3D%20%5Cfrac%7B10%5C%20pounds%7D%7B25%7D%20%2F%20%5Cfrac%7B%5C%2425%7D%7B25%7D%20%3D%20%5Cfrac%7B0.4%7D%7B1%7D)
![Unit\ Price = 40\ cents](https://tex.z-dn.net/?f=Unit%5C%20Price%20%3D%2040%5C%20cents)
![40\ cents * 6 = \$2.40](https://tex.z-dn.net/?f=40%5C%20cents%20%2A%206%20%3D%20%5C%242.40)
Required
Determine Ming's error
Ming's error is from here
![\frac{10\ pounds}{\$25} = \frac{10\ pounds}{25} / \frac{\$25}{25} = \frac{0.4}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B10%5C%20pounds%7D%7B%5C%2425%7D%20%3D%20%5Cfrac%7B10%5C%20pounds%7D%7B25%7D%20%2F%20%5Cfrac%7B%5C%2425%7D%7B25%7D%20%3D%20%5Cfrac%7B0.4%7D%7B1%7D)
He calculated the unit rate as pound per dollar.
So, after calculating the unit rate, the unit should be:
![Unit\ Rate = 0.4\ pound/\$](https://tex.z-dn.net/?f=Unit%5C%20Rate%20%3D%200.4%5C%20pound%2F%5C%24)
But instead, he solved as:
![Unit\ Rate = \$0.4/ pound](https://tex.z-dn.net/?f=Unit%5C%20Rate%20%3D%20%5C%240.4%2F%20pound)
<em>Hence, (a) is correct</em>