How do you get the answer for 820 decreased by 25%

Answers

Answer 1
Answer: So in this one, we are DECREASING by 25%, so we say 25% of 820...

25% × 820 =
.25 × 820 = 205

Now since we are decreasing by 25%, we take our answer and subtract it from the original amount, 820.

820 - 205 = 615

820 decreased by 25% is
615.

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Combine the like terms of 4x2-3x+7-2x-5

Answers

The answer would be 4x^2-5x-2

Use the intersect method to solve the equation x^2-1=-x^2+7

Answers

Answer:

The solutions of the equation x^2-1=-x^2+7 are (-2,3) and (2,3)

Step-by-step explanation:

Please, see the attached file.

Thanks.

How do you write 1.75 as a fraction

Answers

1.75 is One and three-fourths (1 and 3/4) or you can make it an improper fraction so it would be 7/4
the fraction would turn into a mixed number.
1.75 in a fraction is 1 75/100 simplifyed is 1 3/4

A lid on a circular container has a diameter of 9 cm. What is the approximate area of the lid? Use 3.14 to approximate pi and round your answer to the nearest hundredth._______ cm2

Answers

area=pir^2

diameter/2=radius
diameter=9
d/2=9/2=4.5=r

area=pi4.5^2
area=pi20.25
aproxpi=3.14
area=63.585
round hundreth
area=63.59

answer is 63.59cm^2
Hi there, A=1/4πd²=1/4*π*9²=63.61725cm², that would round to 63.62cm². Therefore, the answer would be 63.62 cm²

If a chihuahua weighs 5 pounds, how much ounces does he weigh

Answers

The chihuhua is 80 pounds then. Because of the rule 16 ounces in a pound.
The chihuahua should weigh 80 ounces.

Solve the system of equations by graphing on your own paper. What is the x-coordinate of the solution? y = x + 7
y = -2x - 11

Answers

y = x + 7 
y = -2x - 11

x + 7 = -2x - 11
3x + 7 = -11
3x = -18
x = -6

The x-coordinate of the solution is -6.

I have attached a graph of the two equations since the question really wanted you to graph it and then find the answer.