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Simora [160]
3 years ago
9

Jamaal has 20 models of planes and cars. He has three times as many cars as planes. What is the ratio of his cars to total model

s?
Mathematics
1 answer:
yarga [219]3 years ago
3 0
Well... Can you tell me how many planes he has?
Also... Can you multiply the number of planes by 3?
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The string that produces the lowest tone on a piano vibrates 87 times in 3 seconds. How many times would this string vibrate in
kenny6666 [7]

Answer:

21.75

Step-by-step explanation: 87 x 3  * 12

6 0
3 years ago
About 60,000 acres of wetlands are lost each year in the United States. What integer represents the change in wetlands after 4 y
Naddik [55]
Area of wetlands lost per year = 60,000 acres per year
Number of years observed = 4 years
In 4 years:
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5 0
3 years ago
aFigures A and Figures B are shown on the coordinate grid. Which series of transformations demonstrates that the figures are con
Akimi4 [234]

Answer:

C) angles are congruent and all corresponding pairs of sides are congruent a similarity transformation alt corresponding pairs

Step-by-step explanation:

5 0
3 years ago
Ronin kicks a ball over the gate of the first floor balcony. The function h(t)=-36t^2+288t+9 can be used to model the height of
ale4655 [162]

Answer: 4 seconds

Step-by-step explanation:

Given: The function h(t)=-36t^2+288t+9 can be used to model the height of the ball where t is the time in seconds after the ball kicked and h(t) is the height in feet.

Differentiate the given function with respect to t , we get

h'(t)=-36(2)t+288=-72t+288

Put h'(t)=0

\Rightarrow\ -72t+288=0\Rightarrow\ t=\dfrac{288}{72}\\\\\Rightarrow\ t=4

Also, h''(t)=-72

By second derivative test, h(t) is maximum at t=4.

Hence, the time in Devon which the ball reaches it maximum height = 4 seconds

3 0
3 years ago
Does anyone know the answer to the attached?​
user100 [1]
6 ^ 2- 13(6) +42/ -5(6)^2+37(6)-42

36- 78+ 42/ -30^2+222-42
0/ 900+222-42
0/1,080
anything divided by 0 is 0
7 0
3 years ago
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