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VMariaS [17]
3 years ago
13

Shelly biked 21 miles in 4 hours (part A) what is Shelly's average speed in miles per hour (part B) at the same rate how many ho

urs will it take Shelly to bike 42 miles.
Mathematics
1 answer:
Alex73 [517]3 years ago
3 0

A) Divide total miles by total time:

21 miles /  4 hours = 5.25 miles per hour.

B) Divide miles by miles per hour:

42 miles / 5.25 miles per hour = 8 hours.

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The ratio of the number of male lions to female lions in the animal reserve is 21:20 if there are 123 lions in the animal reserv
Katena32 [7]

ANSWER: 60 female lions

In the ratio there are 21 male lions and 20 female lions, in total 41 lions. Create a proportion relating the total number of lions in the ratio (41) and in the problem (123), and the number of female lions in the ratio (20) and in the problem (unknown).

20/41 = x/123

Cross multiply and solve

20(123)=41x

2460=41x

60=x

4 0
3 years ago
A recent poll shows that 35% of adults are in favor of increased funding for education. The number of adults surveyed for the po
erastova [34]
The answer is 91. 260 people were surveyed, and 35 percent said yes. 35 percent of 165 is 91.
6 0
3 years ago
Read 2 more answers
Solve: 19.2 x + 3 = 4.6 3x -5
levacccp [35]

Answer:

x=−1.481481

Step-by-step explanation:

Let's solve your equation step-by-step.

19.2x+3=(4.6)(3)x−5

Step 1: Simplify both sides of the equation.

19.2x+3=(4.6)(3)x−5

19.2x+3=13.8x+−5

19.2x+3=13.8x−5

Step 2: Subtract 13.8x from both sides.

19.2x+3−13.8x=13.8x−5−13.8x

5.4x+3=−5

Step 3: Subtract 3 from both sides.

5.4x+3−3=−5−3

5.4x=−8

Step 4: Divide both sides by 5.4.

5.4x

5.4

=

−8

5.4

x=−1.481481

Answer:

x=−1.481481

4 0
3 years ago
What is the base of a rectangle if it has an area of 100 m² and a height of 5m?
givi [52]
B*H = area of rectangle so do 100/5 to get base so Base=20m
3 0
3 years ago
A penguin starts on a slide 3 feet above the water. He slides down and glides underwater. The function y=x^2-4x+3 shows his path
Viefleur [7K]

Answer:

( 2 , -1 )

Step-by-step explanation:

Given:-

A penguin starts on a slide 3 feet above the water. He slides down and glides underwater. The function of penguin height above/below the water is given  by:

                                    y = x^2 - 4x + 3

Find:-

-The extreme value (vertex) of the parabolic path

Solution:-

- The vertex ( turning point - minima or maxima ) can be evaluated by taking the first derivative of the given function and setting it equal to zero.

                                  dy/dx = 2x - 4

                                   0 = 2x-4

- Then solve for the critical value of function "x":

                                   x = 4/2 = 2 ft

- The vertex can be evaluated by substituting the critical value of "x" back into the function and evaluate for y:

                                  y = (2)^2 -4*2 + 3

                                  y = 4 - 8 + 3

                                  y = -1 ft

- The vertex of parabolic path lies at the coordinates ( 2 , -1 ). That is 2ft horizontal and 1 ft under water.

4 0
3 years ago
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