Please help me solve #2

Answers

Answer 1

Answer: the answer is D because the others don’t work

Answer 2

Answer:

Answer D, because 3•6+6 does not equal 18.

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1. Pizza Paradise delivers pizza in the local neighborhood using bicycles. The bike delivery person, Tommy, uses a bike whose wheels have a radius of 13 in. Tommy’s average biking speed is 15 mph. How many minutes would it take for Tommy to deliver a pizza to a house that is 4 mi away, and how many revolutions of his bike wheels would this take? (A revolution is one full wheel turn.) Use 3.14 to approximate pi. Round to the nearest whole number.

Answers

we need to find circumference of wheele

C=2pir
r=13
C=2pi13
C=26pi
aprox pi=3.14
C=81.64 in

15 miles in 1 hour
4 miles in x hour
15/1=4/x
times x both sides
15x=4
divide 15 both sides
x=0.26666666 hour
times 60 mins
x=16 minutes

how many inches is 4 miles
1miles=5280 feet
1foot=12 inches
5280 tiems 12=63360 inches

circumferenc times number of rotations=63360
81.64 times number=62260
divide both sids by 81.64
number of rotations=776.09...
round
776 rotations

16 minutes and 776 rotations

Find this
unit rate 720 kilometers per 15 liters

Answers

48 kilometers per liter

39.39 inches how many are in 3 meters

Answers

In 3 meters you have 118.11 inches.

in 3 you 11.898 meters

The polygon ABCD was rotated 60° about point P as shown. Which best describes this rotation?

A.
1/6 turn clockwise

B.
1/6 turn counterclockwise

C.
1/3 turn clockwise

D.
1/3 turn counterclockwise

Answers

the answer is B.1/6 turn counterclockwise. why? well it is moving to the left and the clock moves to the right not the the left so that means it is counter clockwise. now to find out if it is 1/3 or 1/6 the circle has 360 degrees, and we already moved 60 so how much is 60 from 360 divide to find out 360/60=6. and since it is only one part it is 1/6 so B is your answer.

David charges $15 plus $5.50 per hour to mow lawns. Ari charges $12 plus $6.25 per hour to mow lawns. In what situations is Ari's charge greater than or equal to David's charge?

Answers

Let's write an equation for what David charges.
Let x equal the number of hours he has been moving lawns and y be the charge.
Every hour, you must add another $5.50.
This is the same as multiplying the number of hours by 5.50.
We also need to add that $15 at the beginning. This leaves our equation as
$y=5.50x+15$

Now, let's write one for Ari.
6.25 per hour...6.25x.
Add the 12 and we get
$y=12x+6.25$

To find when the two are equal, we can set up this equation:
$5.50x+15=12x+6.25$

Now, let's simplify. Since all of our decimals are either halves or quarters, you can multiply everything by 4 to get rid of them.
$22x+60=48x+25$

Subtract 22x from each side to get x on one side.
$60=26x+25$

Subtract 26 from each side to get x alone.
$35=26x$

Divide by 26 to find the value of x.
$x=35/26\approx1.346$

What does this tell us? Well, it tells us that when our number of hours reaches 1.346, their charges are equal.

(The .346 can be estimated as around 20 minutes because it's pretty close to .333, or a third of an hour. This puts 1.346 hours at an hour and 20 minutes.)

We still haven't answered one part of the question, though...after that 1:20 time frame, who is charging more? Well, let's say we had them mow lawns for two hours. Using 2 for x in those earlier equations gives us these values:

$David:\ y=5.50(2)+15=11+15=26$
$Ari:\ y=6.25(2)+12=13+12=25$

It seems that Ari charges less than David past that 1:20 point.

Since the question asked "when is Ari's charge greater than or equal to David's" we would respond by saying whenever he mows lawns for less than an hour and 20 minutes.

My decimal is seven-tenths greater than 46%

Answers

percent means parts out of 100
46%=46/100
7/10=70/100
7/10 more than 46%=70/100+46/100=116/100=1.16

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