It would be 1 one hundred or 1 because 128 in expanded form is
100+20+8. Only 1 one hundred is used is in the number 128. If the number was for example 310, it would be 3 one hundreds. The answer is 1 one hundred or 1. Hope I helped.

8 0

3 years ago

Margaret drove to a business appointment at 80 mph. Her average speed on the return trip was 70 mph. The return trip took her 1/

Gnoma [55]

Margaret traveled 80 miles to the appointment.

Step-by-step explanation:

Given,

Speed while driving for appointment = 80 mph

Speed while coming back = 70 mph

Let,

x be the time taken for the trip

y be the distance covered

Distance = Speed*Time

y = 80x Eqn 1

Time taken in return trip = x+1/7

y = 70(x+1/7)

$y=70x+10$ Eqn 2

Putting value of y from Eqn 1 in Eqn 2

$80x=70x+10\\80x-70x=10\\10x=10$

Dividing both sides by 10

$\frac{10x}{10}=\frac{10}{10}$

x = 1 hour

Putting x = 1 in Eqn 1

$y=80(1) \\y=80$

Margaret traveled 80 miles to the appointment.

Keywords: linear equation, substitution method

Learn more about substitution method at:

#LearnwithBrainly

5 0

4 years ago

A fence builder uses boards 3 1/2 feet long for the vertical slats on the fence. How many slats can be made from a board that is

denis-greek [22]

Answer:

B. 12 slats

Step-by-step explanation:

Divide 42 by 3.5 and you get 12.

7 0

3 years ago