3 years ago

Sam paid 640 for a camera at a 20% off sell how much did it cost before the 20% off

Mathematics

2 answers:

Mazyrski [523]3 years ago

6 0

640 • .20=128
640 +128= 768

Reika [66]3 years ago

5 0

640=20% off
100-20=80
640=80%
divide by 8 both sides
80=10%
times 10 both sides
800=100%
original price is $800

You might be interested in

In a lab, a colony of 100 bacteria is placed on a petri dish. The population triples every "h" hour. What is the population of b

dlinn [17]

Answer:

900

Step-by-step explanation:

3 squared is 9. 9 time 100 is 900

8 0

3 years ago

Write two expressions that show that decreasing a quantity by 10% is the same as multiplying that quantity by 0.9

Contact [7]

Step-by-step explanation:

x -0.1x = x(1-0.1) = 0.9x

3 0

3 years ago

A bag contains 3 red, 5 yellow, and 7 purple marbles. Find the probability of drawing a purple marble followed by a red marble.

jeka57 [31]

Answer:

unsimplified : $\frac{21}{225} or simplified: \: \frac{7}{75}$

Step-by-step explanation:

Work out : Look above at image.

3 0

3 years ago

PLEASE HELP!!!!!!! WILL GIVE BRAINLIEST!!!!!!! AND RATING!!!!

wel

The correct answer is: [A]: " x - 3 " .
________________________________________________

6 0

4 years ago

The value of a house has increased by $4,200 in the past year. By what percent has the value increased if the value last year wa

IgorC [24]

Answer:

The value has increased by 8 percent.

Step-by-step explanation:

Given:

The value of a house has increased by $4,200 in the past year.

The value last year was $52,500.

Now, to find the percent increased.

Value of house = $52,500.

Value of house last year increased by = $4200.

So, to get the percent increased:

$\frac{Value\ of\ house\ last\ year\ increased\ by} {Value\ of\ house}\times 100.$

$=\frac{4200}{52500} \times 100$

$=0.08\times 100$

$=8\ percent.$

Therefore, the value has increased by 8 percent.

6 0

3 years ago