The attached worksheet shows two different combinations of pens and pencils that both sum to a total cost of $10. There are many other combinations that would do the same.

4 0

1 year ago

The amount a spring will stretch varies directly with the amount of weight attached to the spring. If a spring stretches 2.1 inc

aleksklad [387]

Answer:

$1.05\ in$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

Let

x -----> the amount of weight

y ----- the amount a spring will stretch

we know that

For x=80 lb, y=2.1 in

<em>Find the value of k (constant of proportionality)</em>

$k=y/x$

substitute the values

$k=2.1/80$

The linear equation is

$y=(2.1/80)x$

How far will it stretch when 40 pounds is attached?

For x=40 lb

substitute the value of x in the linear equation and solve for y

$y=(2.1/80)(40)=1.05\ in$

3 0

4 years ago

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Tyler knows that the distance around a running track is 400 meters. Beth, Tyler's sister, decides to measure the running track w

Shalnov [3]

Answer:

Step-by-step explanation:

True measurements = 400 meters

Observed measurements = 392 meters

% error = change in measurements / true measurements × 100/1

= (400 - 392) / 400 × 100

= 8/400 × 100

= 0.02 × 100

= 2%

Percentage error of Beth measurements = 2%

4 0

3 years ago

There are 207 students in the 9 classes at East Middle School. At this rate, how many students are in 6 classes?

Shtirlitz [24]

207/9 = 23

23 people per class.

23 * 6 = 138.

In 6 classes, there are 138 students.

6 0

3 years ago

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