State the additive property of zero, and provide an example using any other number

Answers

Answer 1

Answer: The sum of any number and zero is the original number. 0+4=0

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What would you do first to solve this problem? 7x4 [ (6+3) -4]
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You want to put $2,500 in a simple interest account. It has a 4% annual interest rate. How long will it take you to earn $200 in interest?

Answers

I=PRT
I=interst
P=present amount
R=interest rate
T=time in years

we know that
P=2500
R=4%=0.04

we also know that we want 200 in interst or I=200
we need to knw T

so
200=2500(0.04)(T)
200=100(t)
divide both sides by 100
2=T
2 years

The parallelogram shown below has an area of 135 units2 Find the missing base.

Answers

Answer: 9

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Explanation:

The area of the parallelogram is equal to the base times height. The formula to use is A = b*h. The height and base are always perpendicular to one another.

The base is some unknown variable b. Multiply the base by the height 15 to get 15*b which is equal to the area 135

Therefore, 15*b = 135

Divide both sides by 15 and we isolate b

15b = 135

15b/15 = 135/15

b = 9

So the base is 9

Check:

area = base*height = 9*15 = 135

so the answer is confirmed

side note: we never use the value 17 at all. It is likely put in there as a distraction.

Answer:

Step-by-step explanation:

Khan Academy

What is the mass of the 2.5 kilogram in mass in grams

Answers

Answer:

2500g

Step-by-step explanation:

In the Metric Decimal System. Each subunit (to the left) is 10 times higher or 1/10 times lower .

1Kg 1hg 1dag 1g 1dcg 1cg 1 mg

1000g 100g 10g 1g 0.1g 0.01g 0.001g

From the scheme above, we have many relations. The one that answers the question is below followed by a rule of three:

1 kg----1000g

2.5kg-----x

x=2500g

1 kg= 1000g

So to go from kilograms to grams, multiply by 1000:
2.5kg*1000= 2500 g

Answer: 2500 g

What is 2.48 rounded to the nearest tenth

Answers

2.48 rounded to the nearest 10th would be 2.5

2.5
because the 8 is higher than 5 so that means that the 4 will go up one number so it will go up to 5

What two facts can you double to find 8x4?

Answers

4 is equal to 2*2 (double the 2 is 4)

We can get the value of 8*4 on two steps:
1- we multiply the 8 by 2
2- we add the result of the multiplication to itself

This is illustrated as follows:
8*2 = 16
16+16 = 32

The graphs Ax + By: 18 and Ax - By: 6 intersect in (3,-2). He finds A and B.
please I thank you much...:)

Answers

substitute your point (3,-2) on both equations:
A(3)+b(-2)=18 <--equation 1
a(3)-b(-2)=6 <--equation 2
add both equations, you'll get
6A=24
A=4

substitute the value of A in any equtions
equation 1: (4)(3)-2b=18
simplify and solve for b, you'll get b=-3

thus, A=4 & B=-3

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