Mathematics, 14.11.2019 07:31, godchaux15395

David hikes 2 1/4 miles in 1/2 hour

a. what is his rate in miles per hour?
b. at this rate, how long will it take him to walk 18 miles?
c. if he walks for 7 hours, how far will he have gone?

Answers: 1

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answered: Officaljazz18

I dont know a but b is 8 and c is 31.5

answered: daniecott

A) 4.5 miles

B) 4 hours

C) 31.5 miles

Step-by-step explanation:

Given: David hikes 2 1/4 miles in 1/2 hour

To find: A. Rate in miles per hour

B. At this rate,how long will it take him to walk 18 miles?

C. If he walks for 7 hours, how far will he have gone?

Solution: To find the rate in miles per hour we need to multiply $2 \frac{1}{4}$ by 2.

So, the rate $=\frac{9}{4}\times2$

$=\frac{9}{2}$

=4.5 miles per hour

Hence, the rate is 4.5 miles per hour.

B. To find at this rate, how long will it take him to walk 18 miles, first we need to find the time taken to walk 1 mile.

He take $\frac{1}{4.5}$ hour to walk 1 mile.

So, to walk 18 miles it take $\frac{1}{4.5} \times18$

$=2\times2$

hours

Hence, at this rate he can walk 18 miles in 4 hours.

C. To find, If he walks for 7 hours, how far will he have gone we need to multiply 4.5 by 7

So, $4.5\times7=31.5$

Hence, in 7 hours he can walk 31.5 miles

answered: Guest

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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answers

rauschg

rauschg · hand

know the answer? add it here!

step-by-step explanation:

answered: Guest

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41 $4.41/7 = $.63 each at fresh side

5 bagels for $3.60 $3.60/5 = $.72 each at value mart

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David hikes 2 1/4 miles in 1/2 hour

a. what is his rate in miles per hour?
b. at...