Use the formula for the area of a parallelogram:
![\sf A=bh](https://tex.z-dn.net/?f=%5Csf%20A%3Dbh)
Plug in what we know:
![\sf A=(7\dfrac{1}{2})(5\dfrac{2}{7})](https://tex.z-dn.net/?f=%5Csf%20A%3D%287%5Cdfrac%7B1%7D%7B2%7D%29%285%5Cdfrac%7B2%7D%7B7%7D%29)
Convert both of them into improper fractions. We do this by multiplying the denominator to the whole number, adding it to the numerator, which becomes our new numerator, and we keep the denominator the same:
![\sf A=(\dfrac{15}{2})(\dfrac{37}{7})](https://tex.z-dn.net/?f=%5Csf%20A%3D%28%5Cdfrac%7B15%7D%7B2%7D%29%28%5Cdfrac%7B37%7D%7B7%7D%29)
Now multiply the numerators and denominators together:
![\sf A=\dfrac{15}{2}\cdot\dfrac{37}{7}\rightarrow\dfrac{15\cdot 37}{2\cdot 7}\rightarrow\dfrac{555}{14}](https://tex.z-dn.net/?f=%5Csf%20A%3D%5Cdfrac%7B15%7D%7B2%7D%5Ccdot%5Cdfrac%7B37%7D%7B7%7D%5Crightarrow%5Cdfrac%7B15%5Ccdot%2037%7D%7B2%5Ccdot%207%7D%5Crightarrow%5Cdfrac%7B555%7D%7B14%7D)
Convert it back into a mixed number. 14 goes into 555 thirty-nine times. 14 * 39 = 546. 555 - 546 = 9. So we have 39 wholes and 9 left over, or:
![\sf 39\dfrac{9}{14}](https://tex.z-dn.net/?f=%5Csf%2039%5Cdfrac%7B9%7D%7B14%7D)
So this is the area of the parallelogram.
Answer:
I'm not good with the type of math on 3, so I'm going to answer 4. (P.S I don't know the question you're asking, so I'm going to assume you want to know the area and perimeter of the shapes.
Step-by-step explanation:
To solve number 4 I added the width of the 2 triangles to give me the width of the rectangle, so then 2 times 9 is 18. Then for the triangles. The formula for triangles is base times height divided by 2. So we add the areas of all shapes and we get: 18+6+24=48m. So the area for number 4 is 48 meters.
(hope this was your question)
Answer:
Step-by-step explanation:
3. slope of CB = rise/run = 5/12 BF = 5 CF = 12
BF ⊥ DF
DB (seg of two farthest points) = √BF²+DF² = √5²+32² = √1049 = 32.4
4. f(x) = 2x² - 5x -3 vertex : A (h,k) for f(x) = ax² + bx +c
h = - b/2a = - (-5 / 4) = 5/4
f = f(h) = 2*(5/4)² - 5*(5/4) - 3 =25/8 - 25/4 -3 = -49/8
A (5/4 , - 49/8) i.e. (1.25 , - 6.13)
negative root: 2x² - 5x -3 = (2x+1) (x- 3) x = - 1/2 y = 0
B (- 1/2 , 0)
x coordinate of AB: 1/2 (1.25 + -0.5) = 0.375
Answer:19800
Step-by-step explanation:
Answer:
![\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20rate%7D%3D%5Cfrac%7B%5Ctext%7B40%20laps%7D%7D%7B%5Ctext%7B%20hour%7D%7D)
Step-by-step explanation:
Please consider the complete question.
Sebastian swan laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In that time, he swam 1800 laps. What was his average rate in laps per hour?
Let us convert time taken into hours as:
![\text{Days}=5\times 12=60](https://tex.z-dn.net/?f=%5Ctext%7BDays%7D%3D5%5Ctimes%2012%3D60)
![\text{Minutes}=60\times 45](https://tex.z-dn.net/?f=%5Ctext%7BMinutes%7D%3D60%5Ctimes%2045)
1 hour = 60 minutes. To convert minutes into hours, we will divide total minutes by 60.
![\text{Hours}=\frac{60\times 45}{60}=45](https://tex.z-dn.net/?f=%5Ctext%7BHours%7D%3D%5Cfrac%7B60%5Ctimes%2045%7D%7B60%7D%3D45)
Now, we will divide 1800 by 45 to find average rate in laps per hour as:
![\text{Average rate}=\frac{\text{1800 laps}}{\text{45 hours}}](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20rate%7D%3D%5Cfrac%7B%5Ctext%7B1800%20laps%7D%7D%7B%5Ctext%7B45%20hours%7D%7D)
![\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20rate%7D%3D%5Cfrac%7B%5Ctext%7B40%20laps%7D%7D%7B%5Ctext%7B%20hour%7D%7D)
Therefore, Sebastian's average rate is 40 laps per hour.