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Anton [14]
3 years ago
12

Mary drove to Birmingham Airport at 45 miles per hour for the first two hours and then at 70 miles per hour for the remainder of

the journey. Her average speed for the entire journey was 60 miles per hour. How long did Mary's journey to Birmingham Airport take?
Mathematics
1 answer:
Vsevolod [243]3 years ago
4 0

THE AVERAGE SPEED IS SET TO CONFUSE YOU.

Step-by-step explanation:

IF YOU SEE, THE AVERAGE SPEED YOU TAKE OUT WITH THE SPEEDS

INITIAL AND FINAL YOU ALREADY HAVE

v s (45 mi/h + 70 mi/h)/2 x 57.5 mi/h

ALMOST IS EQUAL TO 60 mi/h

AS FOR TOTAL TIME DISTANCE IS REQUIRED, WE KNOW  THAT MARY

TRAVELS FOR MORE THAN TWO HOURS, BUT WE DON'T KNOW  FROM

HOW FAR FROM THE AIRPORT MARY START DRIVING.  IT WON'T

TAKE THE SAME IF MARY DRIVES FROM MONTGOMERYI OR FROM

BUENOS AIRES, ARGENTINA.

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Ella takes 1 3/5 hours to complete a painting. Holly takes 3/4 of the time that Ella takes. How long will Holly take to complete
Misha Larkins [42]
1. you have to figure out what 3/4 of Ella's time is.
1 \frac{3}{5}  =  \frac{8}{5}
(You find that out by multiplying 5x1. Then add 3.)
2. Convert the fractions into decimals. (This will help make it easier when dividing.)
\frac{8}{5}  = 8 \div 5 = 1.6
\frac{3}{4}  = 3 \div 4 = .75
3. Next you are going to divide 1.6 by .75
1.6 \div .75 = 2.13
4. Now multiple 2.13 by 5.
2.13 \times 5 = 10.65
Answer is 10

3 0
3 years ago
A farmstand sells two types of grapes. the cost of green grapes can be represented by the equation Y= 1.5X, where Y is the total
creativ13 [48]

Answer:

C. Black grapes cost more per pound than green grapes.

Step-by-step explanation:

<em>Verify each statement</em>

A. Three pounds of green grapes cost $6.00

The statement is False

Because

For x=3 pounds

y=1.5x

y=1.5(3)=$4.5

B. Black grapes cost less per pound than green grapes

The statement is False

Because

For x=1 pound

The green grapes cost ----> y=1.5(1)=$1.5

Observing the graph

For x=1 pound

The black grapes cost $2

C. Black grapes cost more per pound than green grapes.

The statement is True

D. Two pounds of black grapes cost $3.00.

The statement is False

Because

Observing the graph

Two pounds of black grapes cost $4

3 0
3 years ago
A play was attended by 173 people. Adult tickets were $5 each and children paid $3 for each ticket the total revenue was $703. H
mr_godi [17]
The answer to this is 10545.
3 0
2 years ago
Read 2 more answers
If the diameter of the circle is 24 cm, find its area correct to 1 decimal place.
Blababa [14]

Answer:

452.4 cm^2

Step-by-step explanation:

Use the area formula A = πr².  With d = 24 cm, r = 12 cm, and so the desired area is

A = π(144 cm^2) = 452.4 cm^2

6 0
2 years ago
Jordan is putting a fence around a garden that is shaped like a half circle and rectangle
grin007 [14]

Answer:

92 ft  

Step-by-step explanation:

Assume the garden has the shape shown below.

The length of fencing equals the distance around three sides of the rectangle plus that around the semicircle.

1. Around the rectangle

Distance = 28 ft + 14 ft + 28 ft = 70 ft

2. Around the semicircle

For a circle.

C = 2πr

For the semicircle,

½C =½(2πr) = πr  

D = 14 ft, so

r =    7 ft

\text{Distance} = \dfrac{22}{7} \times \text{7 ft} = \text{22 ft}

3. Total distance

Distance = 70 ft + 22 ft = 92 ft

Jordan will need 92 ft of fencing.

 

8 0
2 years ago
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